Church of San Pedro de Plecín is a late Romanesque former parish church. It probably stands on an ancient pre-Christian place of worship and was built in the last quarter of the 12th century as a Romanesque chapel, or cella, of rectangular shape. The temple's west side was expanded in the 13th century and renovated and equipped with a porch in the 15th century. In the 16th century, a funeral chapel was attached on the northern side. In 1787, a new parish church was erected in the center of Alles, and this church was abandoned. The temple has a single nave and currently a straight apse, which was preceded by a semicircular apse. The main entrance is on the southern side. The apse is made out of blocks of sandstone, which are also used in the roof on the southern end. The nave is limestone masonry. The roof is topped by a barrel vault and the nave has a wooden ceiling.
The southern entrance rests on a plinth and is protected with a grooved tile. It consists of four slightly pointed archivolts, over which runs a honeycomb design similar to that on the posts which support the archivolts. The archivolts have various decorative elements, but the capitals are badly deteriorated. They are decorated with plant motifs, human figures and various fantastic creatures (mermaids, griffins and centaurs). Their base shafts no longer exist. On the right is a small window divided with an arrow, which is framed by a checkered dust cover and a molded and a five lobed archivolt arc.
The funeral chapel on the north side is of a square layout. It has no openings, and is roofed with a simple ribbed vault, which has helped protect the scalloped brackets upon which the roof rests.
Inside, the bases that supported the columns of the triumphal arch have been preserved. A possible capital of this arch is now in the City of Alles. It is decorated with plant motifs. The straight section preceding the apse runs under a covered arcade with three columns on each side, and the remaining two small bases. At present, vegetation and weeds invade the interior of the church and all its walls. Its ruins were recently cleaned and consolidated. The church of San Pedro/San Salvador de Plecín is a beautiful example of late Romanesque churches akin stylistically to other late Romanesque structures in Palencia and Burgos.
References:The Chapel of St. Martin is the only completely preserved Romanesque building in Vyšehrad and one of the oldest in Prague. In was built around 1100 in the eastern part of the fortified outer ward. Between 1100 and 1300, the Rotrunda was surrounded by a cemetery. The building survived the Hussite Wars and was used as the municipal prison of the Town of the Vyšehrad Hill.
During the Thirty Years’ War, it was used as gunpowder storage, from 1700 to 1750, it was renovated and reconsecrated. In 1784, the chapel was closed passed to the military management which kept using it as a warehouseand a cannon-amunition manufacturing facility. In 1841, it was meant to be demolished to give way to the construction of a new road through Vyšehrad. Eventually, only the original western entrance was walled up and replaced with a new one in the sountren side. The dilapidating Rotunda subsequently served as a shelter for the poor.