The history of Hohenklingen castle is closely linked to the small town Stein am Rhein and the monastery St. Georgen. Around 1200, Walter von Klingen erected a residential tower on the site of the present castle. Around 1460, the battlements against firearms were installed.
In 1499, at the time of the Swabian war, and from 1618 to 1648 during the Thirty Years' War, the castle played an important role and was enforced. From 1895 to 1897 the city of Stein am Rhein completed a total renovation to the dilapidated castle. The castle was again extensively restored in 2005-2007. Today Hohenklingen is open to the visitors.
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.