Church of Our Lady

Trier Cathedral is Germany's oldest cathedral, built between 310 and 320 in the time of Constantine the Great (306-337). The first cathedral in the 4th century was destroyed by the Franks, and a further destruction took place in 882 during Viking raids in the Rhineland. The most important building phases that followed were in the 10th century (under Bishop Egbert), in the 13th century (for the interior of the cathedral), from the 14th to the 16th century (for the exterior). Restorations were undertaken in the 19th century, to restore it to its medieval appearance, and after the Second World War. Since 1986, Trier Cathedral has been listed as a UNESCO World Heritage Site.

The Evangelical Church of the Redeemer (Basilica of Constantine) was originally an audience hall for the Roman emperors who resided in the city in the 4th century. In 1614, the south and east walls were demolished and the rest was incorporated into the bishop's new residence, the Electoral Palace. Between 1844 and 1856, the building was restored and donated to the Protestant cult. Severely damaged by an American air raid, it was rebuilt in the 1950s. Since 1986, the Basilica of Constantine has been a UNESCO World Heritage Site.

St. Matthias Abbey, founded in the 4th century, is a Benedictine monastery with a Romanesque basilica as its abbey church. Since the 12th century, the tomb of Apostle Matthias, the only apostle's tomb on German soil and north of the Alps, has been venerated in the crypt of the basilica. When French army troops entered Germany after the Revolution, they requisitioned the abbey buildings in 1794. The abbey was dissolved in 1802 and it was not until 1922 that monks returned to the abbey. Below the choir, the visitor can visit the impressive crypt, where numerous sarcophagi (including the two sarcophagi of the first bishops of Trier, Valerius and Eucharius) are kept. The eastern part of the crypt was added around 1500.