Gaziosmanpaşa (Turkish: [ɡaːziosˈmanpaʃa]; old name: Taşlıtarla) is a developing working class municipality (belediye) and district of Istanbul, Turkey, on its European side. Its area is 12 km, and its population is 495,998 (2022). Esenler and Bayrampaşa are west, Sultangazi is north and Eyüp is south and east of the district.
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Arnavutköy (meaning "Albanian village" in Turkish Turkish pronunciation: [aɾ.na.ʋut.k̟ʰøj]) is a municipality and district of Istanbul Province, Turkey. Its area is 453 km, and its population is 326,452 (2022). It is located on the European side of Istanbul and borders the Black Sea. Istanbul Airport is in the district. The mayor is Mustafa CANDAROĞLU of the AK Party. Arnavutköy borders Çatalca to the west, Büyükçekmece to the southwest, Esenyurt and Başakşehir to the south, and Eyüp to the east. Karaburun is a seaside resort on the Black Sea.
In 2008 the district Arnavutköy was created from parts of the districts Çatalca and Gaziosmanpaşa. The urban part of the new district, 29 neighbourhoods, was established as a municipality. At the 2013 Turkish local government reorganisation, the rural part of the district was integrated into the municipality, the villages becoming neighbourhoods.
Eyüpsultan or Eyüp (pronounced [ˈejyp]) is a municipality and district of Istanbul Province, Turkey. Its area is 228 km, and its population is 422,913 (2022). The district extends from the Golden Horn all the way to the shore of the Black Sea. Eyüp is also the name of a prominent neighborhood and former village in the district, located at the confluence of the Kâğıthane and Alibey streams at the head of the Golden Horn. The Eyüp neighborhood is a historically important area, especially for Turkish Muslims, due to the presence of the tomb of Abu Ayyub al-Ansari, the prominent Medinan companion (Ansar) and standard-bearer of the Islamic prophet Muhammad.
It became a district centre in 1936, after some parts of Fatih, Çatalca and Sarıyer were joined; later it also included Gaziosmanpaşa and Bayrampaşa districts. Its present boundaries were established after the borough of Yayla was given to Sultangazi in 2009. Its neighbours are Sarıyer in the east, Kâğıthane and Beyoğlu in the southeast, Gaziosmanpaşa, Bayrampaşa, Fatih and Sultangazi in the south, Başakşehir in the southwest and Arnavutköy in the west. The municipality was named after Abu Ayyub al-Ansari by the Ottoman Turks.