Istanbul Map

• Istanbul is located in northwestern Turkey within the Marmara Region on a total area of 5,343 square kilometers . The Bosphorus, which connects the Sea of Marmara to the Black Sea, divides the city into a European side, comprising the historic and economic centers, and an Asian, Anatolian side; as such, Istanbul is one of the two bi-continental cities in Turkey among with Çanakkale. The city is further divided by the Golden Horn, a natural harbor bounding the peninsula where the former Byzantium and Constantinople were founded. In the late-19th century, a wharf was constructed in Galata at the mouth of the Golden Horn, replacing a sandy beach that once formed part of the inlet's coastline. The confluence of the Sea of Marmara, the Bosphorus, and the Golden Horn at the heart of present-day Istanbul has deterred attacking forces for thousands of years and still remains a prominent feature of the city's landscape.

• The historic peninsula is said to be built on seven hills, each topped by an imperial mosque, surrounded by 22 kilometers (14 mi) of city walls; the largest of these hills is the site of Topkapı Palace on the Sarayburnu. Rising from the opposite side of the Golden Horn is another, conical hill, where the modern Beyoğlu district is situated. Because of the topography, buildings were once constructed with the help of terraced retaining walls (some of which are still visible in older parts of the city), and roads in Beyoğlu were laid out in the form of steps. Üsküdar on the Asian side exhibits similarly hilly characteristics, with the terrain gradually extending down to the Bosphorus coast, but the landscape in Şemsipaşa and Ayazma is more abrupt, akin to a promontory. The highest point in Istanbul is Çamlıca Hill (also on the Asian side), with an altitude of 288 meters (945 ft).

• Istanbul is situated near the North Anatolian Fault on the boundary between the African and Eurasian plates. This fault zone, which runs from northern Anatolia to the Sea of Marmara, has been responsible for several deadly earthquakes throughout the city's history. Among the most devastating of these seismic events was the 1509 earthquake, which caused a tsunami that broke over the walls of the city, destroyed over 100 mosques, and killed more than 10,000 people. More recently, in 1999, an earthquake with its epicenter in nearby İzmit left 17,000 people dead, including 1,000 people in Istanbul's suburbs. Istanbulites remain concerned that an even more catastrophic seismic event may be in Istanbul's near future, as thousands of structures recently built to accommodate the city's rapidly increasing population may not have been constructed properly. Seismologists say the risk of a 7.6-magnitude earthquake striking Istanbul by 2030 is greater than sixty percent.

• Istanbul is primarily known for its Byzantine and Ottoman architecture, but its buildings reflect the various peoples and empires that have ruled its predecessors. Genoese, Roman, and even Greek forms of architecture remain visible in Istanbul alongside their Ottoman counterparts. Similarly, while the Hagia Sophia and imperial mosques dominate much of the city's skyline, the city is also home to a number of historic churches and synagogues.

• More than two thousand years following the departure of the Greeks, few examples of Istanbul's Greek architecture have survived. Perhaps the most prominent relic of the Greek era is Maiden's (Leander's) Tower. Residing on an islet in the Bosphorus just off the coast of Üsküdar, Maiden's Tower was first built by the Greeks in 411 BC to guide ships within the strait. Since then, however, the tower has undergone a number of enlargements and restorations, rendering its connection to the Greeks tenuous, and today merely serves as an observation point.

• Examples of Roman architecture have proved themselves to be more durable. Obelisks from the Hippodrome of Constantinople, modeled after the Circus Maximus in Rome, are still visible in Sultanahmet Square. A section of the Valens Aqueduct, constructed in the late 4th century to carry water to the city, stands relatively intact over 970 meters (3,200 ft) in the west of the Fatih district. Similarly, the Walls of Constantinople, which were erected in stages well into the Byzantine period, are still visible along much of their original 4-mile (6.4 km) course from the Sea of Marmara to the Golden Horn. Finally, the Column of Constantine, erected in 330 AD to mark the new Roman capital, still stands not far from the Hippodrome.

• Early Byzantine architecture followed the classical Roman model of domes and arches, but further improved these architectural concepts, as in the Church of the Saints Sergius and Bacchus. The oldest surviving Byzantine church in Istanbul (albeit partially in ruins) is the Stoudios (İmrahor) Monastery, which was built in 454. Other extant structures from the early Byzantine period include the Hagia Irene, initially the first church in the new capital, and the Prison of Anemas, which was incorporated into the city walls. After the recapture of Constantinople in 1261, the Byzantines constructed two of their most important churches, Chora Church and Pammakaristos Church. Across the Golden Horn, the Genoese contributed Galata Tower, then the highest point in the citadel of Galata. Still, the pinnacle of Byzantine architecture, and one of Istanbul's most iconic structures, is the Hagia Sophia. Topped by a dome 31 meters (102 ft) in diameter, the Hagia Sofia stood as the largest cathedral for more than a thousand years, before being converted into a mosque and, now, a museum.

• Among the oldest extant examples of Ottoman architecture in Istanbul are the Anadoluhisarı and Rumelihisarı fortresses, which helped block sea traffic aimed at assisting the Byzantines during the Turkish siege of the city. Over the next four centuries, the Ottomans continued to make an indelible impression on the skyline of Istanbul, building towering mosques and ornate palaces. These grand imperial mosques include Sultan Ahmed Mosque (the Blue Mosque), Süleymaniye Mosque, and Yeni Mosque, all of which were built at the peak of the Ottoman Empire, in the 16th and 17th centuries.

• In the following centuries, and especially after the Tanzimat reforms, Ottoman architecture was supplanted by European styles. In contrast to the traditional elements of Topkapı Palace and the mosques on the historic peninsula, Dolmabahçe Palace, Yıldız Palace, and Ortaköy Mosque in Beşiktaş, and Beylerbeyi Palace across the Bosphorus in Üsküdar are clearly of Neo-Baroque style. At the same time, the areas around İstiklal Avenue were filled with grandiose European embassies and rows of buildings in European (mostly Neoclassical and, later, Art Nouveau) style started to appear along the avenue. Istanbul was one of the major centers of the Art Nouveau movement in the late-19th and early-20th centuries, with famous architects of this style building palaces and mansions in the city.

• The urban landscape of Istanbul is shaped by many communities. The religion with the largest community of followers is Islam. Religious minorities include Orthodox Christians, Armenian Christians, Catholic Levantines and Sephardic Jews. According to the 2000 census, there were 2,691 active mosques, 123 active churches and 26 active synagogues in Istanbul; as well as 109 Muslim cemeteries and 57 non-Muslim cemeteries. Some districts used to have sizeable populations of these ethnic groups, such as the Kumkapı district, which had a sizeable Armenian population; the Balat district, which had a sizeable Jewish population; the Fener district, which had a sizeable Greek population; and some neighbourhoods in the Nişantaşı and Beyoğlu districts that had sizeable Levantine populations. Very few remain in these districts, as they either emigrated or moved to other districts. In some quarters, such as Kuzguncuk, an Armenian church sits next to a synagogue, and on the other side of the road a Greek Orthodox church is found beside a mosque.

• The seat of the Ecumenical Patriarch of Constantinople, patriarch of the autocephalous Greek Orthodox Church, is located in the Fener (Phanar) quarter. Also based in Istanbul are the archbishop of the Turkish Orthodox Church, an Armenian archbishop, and the Turkish Grand-Rabbi. A number of places reflect past movements of different communities into Istanbul, most notably Arnavutköy (Albanian village), Polonezköy (Polish village) and Yenibosna (New Bosnia).

• The Muslims are by far the largest religious group in Istanbul. Among them, the Sunnis form the most populous sect, while a number of the local Muslims are Alevis. In 2007 there were 2,944 active mosques in Istanbul.

• Istanbul was the final seat of the Islamic Caliphate, between 1517 and 1924, when the Caliphate was dissolved and its powers were handed over to the Turkish Parliament. On 2 September 1925, the tekkes and tarikats were banned, as their activities were deemed incompatible with the characteristics of the secular democratic Republic of Turkey; particularly with the secular education system and the laicist state's control over religious affairs through the Religious Affairs Directorate. Most followers of Sufism and other forms of Islamic mysticism practiced clandestinely afterwards, and some of these sects still boast numerous followers. To avoid the still active prohibition, these organisations represent themselves as "cultural associations."

• The city has been the seat of the Ecumenical Patriarchate of Constantinople since the 4th century AD. The city is also seat of the Autocephalous Turkish Orthodox Patriarchate and the Armenian Patriarchate. The city was formerly also the seat of the reduced Bulgarian Orthodox Exarchate, before its autocephaly was recognised for a second time by other bodies of the Orthodox Church.

• The everyday life of the Christians, particularly the Greeks and Armenians living in Istanbul changed significantly following the bitter conflicts between these ethnic groups and the Turks during the fall of the Ottoman Empire, which began in the 1820s and continued for a century. The conflicts reached their culmination in the decade between 1912 and 1922; during the Balkan Wars, the First World War and the Turkish War of Independence. The Christian population declined from 450,000 to 240,000 between 1914 and 1927. Today, most of Turkey's remaining Greek and Armenian minorities live in or near Istanbul. The number of the local Turkish Armenians in Istanbul today amount to approximately 45,000 (not including the nearly 40,000 Armenian workers in Turkey who came from Armenia after 1991 and mostly live and work in Istanbul); while the Greek community, which amounted to 150,000 citizens in 1924, currently amounts to approximately 4,000 citizens. There are also 60,000 Istanbulite Greeks who currently live in Greece but continue to retain their Turkish citizenship.

• The Sephardic Jews have lived in the city for over 500 years. They fled the Iberian Peninsula during the Spanish Inquisition of 1492, when they were forced to convert to Christianity after the fall of the Moorish Kingdom of Andalucia. The Ottoman Sultan Bayezid II (1481–1512) sent a sizable fleet to Spain under the command of Kemal Reis to save the Sephardic Jews. At that point in the Caliphate's history it was a beacon of tolerance compared to most of Christendom. More than 200,000 Jews fled first to Tangier, Algiers, Genova, and Marseille, later to Salonica, and finally to Istanbul. The Sultan granted over 93,000 of these Spanish Jews to take refuge in the Ottoman Empire. Another large group of Sephardic Jews came from southern Italy, which was under Spanish control. The İtalyan Sinagogu (Italian Synagogue) in Galata is mostly frequented by the descendants of these Italian Jews in Istanbul, where more than 20,000 Sephardic Jews still remain today. There are about 20 synagogues, the most important of them being the Neve Shalom Synagogue inaugurated in 1951, in the Beyoğlu district.

• In 1883, a Belgian entrepreneur, Georges Nagelmackers, began a rail service between Paris and Istanbul, using a steamship to ferry passengers from Varna to Constantinople. In 1889, a rail line was completed going directly from Istanbul to Bucharest, making the whole journey via land possible. The route was known as the Orient Express, made even more famous by the works of Agatha Christie and Graham Greene.

• Today, the Sirkeci Terminal of the Turkish State Railways (TCDD), which was originally opened in 1890 as the terminus of the Orient Express, is the terminus of all the lines on the European side and the main connection node of the Turkish railway network with the rest of Europe.

• Currently, international connections are provided by the line running between Istanbul and Thessaloniki, Greece, and the Bosphorus Express serving daily between Sirkeci and Bucharest, Romania. Lines to Sofia, Belgrade, Budapest are established over the Bosphorus Express connection to Bucharest.

• Beyond the Bosphorus, the Haydarpaşa Terminal on the Asian side serves lines running several times daily to Ankara, and less frequently to other destinations in Anatolia. The railway networks on the European and Asian sides are currently connected by the train ferry across the Bosphorus, which will be replaced by an underwater tunnel connection with the completion of the Marmaray project, scheduled for 2012. Marmaray (Bosphorus Rail Tunnel) will also connect the metro lines on the European and Asian parts of the city. Inaugurated in 1908, the Haydarpaşa Terminal was originally opened as the terminus of the Istanbul-Konya-Baghdad and Istanbul-Damascus-Medina railways.

• A suburban railway line runs between the main train station of the European part, the Sirkeci Terminal, and the Halkalı district towards the west of the city centre, with 18 stations along its 30 km length. A single trip takes 48 minutes. Another suburban line runs on the Anatolian part from the main train station, the Haydarpaşa Terminal, to Gebze at the eastern end of the city. The 44 km long line has 28 stations and the trip takes 65 minutes. 720,000 passengers use the urban rail lines on the European side of the city every day.

• Along with the traditional Turkish restaurants, many European and Far Eastern restaurants and numerous other cuisines are also thriving in the city. Most of the city's historic winehouses (meyhane in Turkish) and pubs are located in the areas around İstiklal Avenue in Beyoğlu. The 19th century Çiçek Pasajı (literally Flower Passage in Turkish, or Cité de Péra in French) on İstiklal Avenue, which has many historic meyhanes, pubs and restaurants, was built by Hristaki Zoğrafos Efendi at the former site of the Naum Theatre and was inaugurated in 1876. The famous Nevizâde Street, which has rows of historic meyhanes next to each other, is also in this area.

• Other historic pubs are found in the areas around Tünel Pasajı and the nearby Asmalımescit Sokağı. Some historic neighbourhoods around İstiklal Avenue have recently been recreated, with differing levels of success; such as Cezayir Sokağı near Galatasaray Lisesi, that has rows of pubs, cafés and restaurants playing live music.

• Istanbul is also famous for its historic seafood restaurants; as an example, the Kumkapı neighbourhood has a pedestrian-only area that is dedicated to fish restaurants. Some 30 fish restaurants are found there, many of them among the best of the city. Also, many of the most popular and upscale seafood restaurants (with picturesque views) are found along the shores of the Bosphorus, particularly in Bebek, Arnavutköy, Yeniköy, Beylerbeyi and Çengelköy; and by the Marmara Sea shore towards the south of the city. The largest of the Princes' Islands in the Sea of Marmara (namely Büyükada, Heybeliada, Burgazada and Kınalıada) and Anadolu Kavağı near the northern entrance of the Bosphorus towards the Black Sea (close to Yoros Castle, which was also known as the Genoese Castle due to Genoa's possession of it in the mid-15th century) also have many historic seafood restaurants.