Belgrade, Serbia has an abundance of religious architecture. The city has numerous Serbian Orthodox churches and temples and it is also the seat of the Patriarch of the Serbian Orthodox Church. Its two most prominent Orthodox Christian places of worship are the Saborna Crkva (the Cathedral Church) and the Temple of St. Sava, the largest Eastern Orthodox church in the world.

Other notable Belgrade churches include St. Mark’s Church, in which rests the body of the first Serbian Emperor, Stefan Dušan. The architecture of this church was greatly inspired by the Gračanica monastery in the province of Kosovo. The church of Sveta Ružica in the Kalemegdan Fortress is one of the holiest places in Belgrade for Serbian Orthodox Christians since this was the site where the body of St. Paraskeva was preserved for several years after the Ottoman conquest, before being taken to Romania where it still rests today. St. Paraskeva (Sv. Petka) is one of the most important saints to the Eastern Orthodox Christians.

Belgrade is the seat of a Catholic archdiocese, with a small Catholic community and several Catholic churches. One of these, St Anthony’s, was designed by the noted Slovenian architect Jože Plečnik.

There is also a Muslim community in Belgrade and only one mosque, the Bajrakli Mosque built in 1526 by the Ottoman Sultan, Suleiman the Magnificent. It is one of the oldest surviving structures in contemporary Belgrade.

The Jewish community is served by the Belgrade Synagogue, which is the only currently active Jewish place of worship in the entire country, although not the only such structure within the city limits.

Belgrade also had an active Buddhist temple in the first half of the 20th century. It was built by East Russian expatriates fleeing the outcome of the Bolshevik Revolution of 1917.

Orthodox
Church of St. Alexander Nevsky, Dorćol
Church of St. Basil of Ostrog, Bežanija
Church of St. Nicholas, Zvezdara
Church of St. George, Banovo Brdo
Church of St. George, Oplenac
Church of St. Jovan Vladimir, Voždovac
Church of St. Tryphon, Čukarica
Church of Saint Sava, Vračar
Church of the Convocation of Serbian Saints, Palilula
Church of the Holy Apostles Peter and Paul, Topčider
Church of the Holy Father Nikolaj, Zemun, built in 1725–1731
Church of the Holy Trinity, Voždovac
Church of the Holy Trinity, Vračar
Church of the Holy Trinity, Zemun
Russian Church of the Holy Trinity
Church of the Holy Emperor Lazar
Church of the Nativity of the Most Holy Mother of God, Zemun, built in 1780
Church of the Nativity of the Most Holy Mother of God, Zvezdara
Church of the Nativity of St. John the Baptist, Voždovac
Ružica Church, Kalemegdan
St. Michael’s Cathedral
St. Mark’s Church
Monastery of St. Archangel Gabriel, Zemun, its church was built in 1786, on a site of older church
Crkva Svetog Dimitrija (Zemun)
Crkva Svetog djakona Avakuma i igumana Pajsija (Zemun)
Rajinovac monastery
New Cemetery Church

Roman Catholic
Co-cathedral of Christ the King in Belgrade, built in 1927
Crkva uznesenja blažene djevice Marije (Zemun), built in 1795, Roman Catholic, built on a site of previous mosque
Crkva svetog Roka (Zemun), built in 1836, Roman Catholic
Samostan Svetog Ivana Krstitelja i Antuna (Zemun), built in 1750-1752, Franciscan/Roman Catholic

Islamic
Bajrakli Mosque, Belgrade

Protestant
Evangelical Church, Zemun, built in 1920s, Evangelical

Synagogues
Zemun Synagogue, built in early 20th century, sold to a restaurant owner during Slobodan Milošević’s rule, but the Jewish Municipality of Zemun is trying to recuperate the building.

Source from Wikipedia