Transfiguration Church of the St. Euphrosine monastery is a well-preserved monument of Pre-Mongol Rus architecture. It was built between 1152 and 1161 by the Polatsk architect Ioann by the order of the princess St. Euphrosyne of Polatsk as a cathedral church of the Convent of the Saviour and St. Euphrosyne. In 1582, King Stefan Batory gave the church to the Order of Jesuits. In 1832, the church was placed under the Orthodox administration, and in 1990 it became a property of the Belarusian Exarchate. In the 19th century it was partially remodeled according to the design by the architect A. Port.References:
The Basilica of Santa Maria in Trastevere is one of the oldest churches of Rome. The basic floor plan and wall structure of the church date back to the 340s, and much of the structure to 1140-43. The first sanctuary was built in 221 and 227 by Pope Callixtus I and later completed by Pope Julius I.
The inscription on the episcopal throne states that this is the first church in Rome dedicated to Mary, mother of Jesus, although some claim that privilege belongs to the Basilica di Santa Maria Maggiore. A Christian house-church was founded here about 220 by Pope Saint Callixtus I (217-222) on the site of the Taberna meritoria, a refuge for retired soldiers. The area was made available for Christian use by Emperor Alexander Severus when he settled a dispute between the Christians and tavern-keepers.
The church underwent two restorations in the fifth and eighth centuries and in 1140-43 it was re-erected on its old foundations under Pope Innocent II.