The oldest part of Eksta Church is the tower, dating from the 13th century and still unchanged. The rest of the church is also from the Middle Ages, but was heavily rebuilt in 1838. The church still has four medieval portals, in both Romanesque and Gothic style. The interior of the church is largely Neoclassical, dating from the 1838 renovation. A few traces of medieval frescos have survived on the walls, as have a single stained glass window pane.
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.