Predigerkirche is one of the four main churches of the old town of Zürich. First built in 1231 as a Romanesque church of the then Dominican Predigerkloster, the Basilica was converted in the first half of the 14th century, the choir between 1308 and 1350 rebuilt, and an for that time unusual high bell tower was built, regarded as most high Gothic edifice in Zürich.
The abbey-choir building had been used for secular purposes since the 16th century Protestant Reformation, and was transformed by the installation of shelves into a warehouse building. For several centuries it was used as a granary. Since 1914 the choir building has been administrated by the Zentralbibliothek (Zürich central library), the main library of both the canton, city and the University of Zürich.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.