The Apollinariskirche is a church on the site of a Roman temple on the Apollinarisberg, a hill above the German town of Remagen. That hill was known as the Martinsberg in the 5th and 6th centuries, presumably after a Frankish chapel there dedicated to Saint Martin, patron of the Franks. In the 9th century this chapel was replaced by a Romanesque church.
In 1110 the Benedictines of the Michaelsberg Abbey, on the initiative of the people of Remagen, set up a provost there. The relics of Saint Apollinaris of Ravenna probably arrived on the mountain at the end of the 14th century, since a pilgrimage to the Apollinarisberg is recorded in 1384. The sarcophagus is the main relic in the 14th century crypt of the church.
A new Neo-Gothic church was built on the site from 1837 to 1852.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.