Katedral Tripoli

The building known as Tripoli Cathedral, today the Gamal Abdel Nasser Mosque, stands in the old city of Tripoli, Libya, on Algeria Square (Maidan al-Jazair). It was built as the city's Catholic cathedral during the Italian occupation and was later converted into a mosque. Its architecture is described as Romanesque Revival. The square was once called Cathedral Square after the building. Since the 2011 revolution the mosque has been referred to in Arabic sources as the mosque of the Islamic Call Society.

The cathedral was founded in the 1920s, during the Italian occupation of Libya, and officially opened in 1928. The Libyan painter and theatre artist Osman Nujaym was among those who took part in its decoration. The church did not belong to the Italian government but was linked to the Vatican.

The building was later converted into a mosque and named the Gamal Abdel Nasser Mosque. After the revolution of 17 February 2011 its name was changed to the mosque of the Islamic Call Society. The sources do not give the date of the conversion.

It was not the city's first Catholic cathedral. An earlier one, Santa Maria degli Angeli, was built in 1870 by the Maltese community in the Dahra district of Tripoli.