When the previous synagogue on the Rue Grignan in Marseille was in disrepair and too small, a campaign began in 1855 to raise money for a new site. The design by the architect Nathan Salomon was approved in 1860 and the building finished in 1864.
The synagogue takes the basilica form more commonly associated with ancient Greece and Rome, and churches. It is built in the Romano-Byzantine style, and takes influence from the Synagogue de Nazareth, completed in Paris in 1852. A pulpit and an organ – both also associated more with Christian buildings than Jewish ones – feature inside, and the mix of Western and Oriental designs was chosen to reflect the diversity of the worshippers.
The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.