The Protestant parish church at Altenkirchen is one of the oldest church buildings on the island of Rügen. The predecessor of the current church could have been a Slavic burial mound. Soon after the Christianization Danish builders erected a three-nave Romanesque church in 1168. The apse and choir were completed in 1200 and the baptismal font in 1240. There is also a triumphal cross from the 14th century. The freestanding belfry of the church dates from the 17th century. The Baroque altar from 1724 was made in the workshop of Elias Kessler from Stralsund.
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.