Karaite Synagogue (Istanbul)

Maalem Synagogue is a synagogue located on the slopes overlooking the Golden Horn near the Jewish old age home in the Hasköy district of Istanbul, Turkey. It is the only remaining open synagogue in an area that once had many Jewish residents. The synagogue is open for visits only during weekdays. Shabbat services are held regularly.

Mayor Synagogue is a former synagogue in the Hasköy district of Beyoğlu, Istanbul, Turkey.

Handan Agha Mosque is a mosque near the Golden Horn in the Hasköy neighborhood of Beyoğlu, Istanbul, Turkey. It is also known as the Kuşkonmaz or "Birds Don't Perch" Mosque. One of Sultan Mehmed II's aghas, Handan Agha, had it built in the 15th century. The interior is decorated with İznik tiles from the 16th and 17th centuries, with some maiolica tiles from the 19th century. The basement of the mosque was formerly a boathouse, until the coastline was filled for land reclamation. The mosque was repaired in the 18th and 19th centuries, and the 1960s.

Kırmızı Minare Mosque (Red Minaret Mosque) is a mosque in the Hasköy neighborhood of Beyoğlu, Istanbul, Turkey. It was probably built in 1591 by Kiremitçi Ahmet Agha and so is also known as the Kiremitçi Ahmet Agha Mosque. It received the name "Red Minaret" because of its red brick minaret. The building was restored in 1889 and 1994.

Hasköy is a district on the northern bank of the Golden Horn in Beyoğlu, Istanbul, Turkey. It includes the neighborhoods of Keçeci Piri, Piri Paşa, and Halıcıoğlu, and parts of Camiikebir and Sütlüce. Hasköy means "imperial village" in Turkish, a reference to the pavilions and gardens belonging to the Ottoman sultan and his court once found here. According to other sources, the name is a corruption of Aya Paraskevi, Αγία Παρασκευή, the local Greek Orthodox church.In the late fifteenth century, Jews expelled from Spain and Portugal took refuge in the Ottoman Empire and many of them settled in Hasköy. In the late sixteenth century, the Jewish community of Eminönü was displaced by the construction of the New Mosque (Yeni Cami) and also moved to Hasköy. The neighborhood also had many Armenian and Greek residents in the past. It was known to Armenian speakers as Khasgiugh (Խասգիւղ), "khas" reflecting the older pronunciation of the Turkish word "has" and "giugh" being the Armenian word for village. Hasköy was a trading area with many dockyards and warehouses. The first Armenian theatre company in Istanbul was founded here in 1858.Local attractions include the Aynalıkavak Palace and the Rahmi M. Koç Museum. At one time there were several active synagogues in Hasköy including the Maalem Synagogue, Hesed Le Avraam Synagogue, the Karaite Synagogue and the former Mayor Synagogue. The Greek Orthodox Church of Aya Paraskevi (Saint Paraskevi) still functions and has been provided by the Ecumenical Patriarchate to the local Romanian Orthodox community. The Surp Stepanos (Saint Stephen) Armenian Church was established by Armenian immigrants from Eğin. From 1852 to sometime in the 20th century, the Halıcıoğlu Armenian Protestant Church also offered services; while from 1889 to 1975, there was also a chapel attached to Hasköy's Kalfayan Orphanage, the Surp Asdvadzadzin (Saint Mary) Armenian Church.Local mosques include the Handan Agha Mosque, and Kırmızı Minare Mosque. Local cemeteries include the Hasköy Muslim Cemetery, the Beyoğlu Greek Cemetery, the Beyoğlu Jewish Cemetery, the Turkish Karaite Congregation Cemetery, and the Hasköy Armenian Cemetery. The Jewish Cemetery contains the grave of Abraham Kamondo, a banker to the Ottoman court. On April 26, 2011, the cemetery was desecrated by vandals who smashed several headstones in what appears to have been an act of anti-Semitism.

Aynalıkavak Pavilion (Turkish: Aynalıkavak Kasrı) is a former Ottoman pavilion located in the Hasköy neighborhood of Beyoğlu district in Istanbul, Turkey. It was constructed during the reign of Sultan Ahmed I (1603-1617), with various additions and changes over time. It is under the administration of the Turkish Directorate of National Palaces.

USS Thornback (SS-418), a Tench-class submarine, was the only ship of the United States Navy to be named for the thornback, a slender member of the shark family with a long pointed snout and a sharp spine at the end of each dorsal fin, native to northern Atlantic waters ranging from the temperate to the Arctic. Her keel was laid down on 5 April 1944 by the Portsmouth Navy Yard. She was launched on 7 July 1944 sponsored by Mrs. Peter K. Fischler, and commissioned on 13 October 1944 with Commander Ernest P. Abrahamson in command.

Yanbol Synagogue is a synagogue in Istanbul, built by Sephardi Jews who moved from the Bulgarian town of Yambol to Istanbul during the 15th century. The synagogue is also known as the Bulgarian Synagogue owing to the origin of the community. The synagogue was constructed in the 18th Century. However, it underwent repairs during the end of the 19th century thus the structure today is not the original. Today, the synagogue is only open for Shabbat services due to a decrease in the Jewish community in the area.

Yusuf Şucaeddin Mosque Fountain or Balat Fountain (Turkish: Balat Çeşmesi) is an Ottoman period fountain in the Ayvansaray neighborhood of Istanbul's Fatih district. After the Golden Horn coastal road works in the 1980s, it remained in the garden of Yusuf Şucaeddin Mosque. It is made of cut limestone and has a hexagonal shape. It has a large reservoir and a fountain on each of its four sides. It is covered with lead. There is a marble slab in place of the mirror stone. Only one fountain has water flowing.

Bulgarian St Stephen Church (Bulgarian: Църква "Свети Стефан"; Turkish: Sveti Stefan Kilisesi), also known as the Bulgarian Iron Church, is a Bulgarian Orthodox church in Balat, Istanbul, Turkey. It is famous for being made of prefabricated cast iron elements in the neo-Byzantine style. The church belongs to the Bulgarian minority in the city.

Atik Mustafa Pasha Mosque (Turkish: Atik Mustafa Paşa Camii; also named Hazreti Cabir Camii) is a former Eastern Orthodox church in Istanbul, converted into a mosque by the Ottomans. The dedication of the church is obscure. For a long time it has been identified with the church of Saints Peter and Mark, but without any proof. Now it seems more probable that the church is to be identified with Saint Thekla of the Palace of Blachernae (Greek: Άγία Θέκλα τοῦ Παλατίου τῶν Βλαχερνών, Hagia Thekla tou Palatiou tōn Vlakhernōn). The building belongs stylistically to the eleventh-twelfth century.

Balat is located on the European side of Istanbul, in the old city on the historic peninsula, on the western bank of the Golden Horn. It was historically the centre of the Jewish community in Istanbul and lies next to the Greek quarter, Fener. The name Balat is probably derived from Greek palation (palace), from Latin palatium, after the nearby Palace of Blachernae. Some of the congregation of Poli Yashan went on to found the Poli Hadash, the latter name being a mix of Greek terms that means "New City".