1. Basilicas of an elongated composition, the interiors of which, with the rhythm of the columns of the main nave, organize the movement forward towards the altar (Basilica in Trier, Santa Maria Maggiore in Rome, Saint-Apollinaire in Ravenna).
2. Churches, baptisteries and mausoleums of a centric composition to which belong (the mausoleum of St. Constanze in Rome, San Vitale in Ravenna, the Church of St. Sergius and Bacchus in Istanbul).
3. Dome basilicas, combining compositional techniques of the first and second types of structures. (Church of St. Sophia in Constantinople)
4. The cross-domed church is one of the most significant contributions of Byzantine architecture to world architecture.
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