is the Electoral Palace, Trier; the Roman Trier Amphitheater; the 2nd century AD Roman bridge (Römerbrücke) across the Moselle, the oldest bridge north of the Alps still crossed by traffic; ruins of three Roman baths, among them the largest Roman baths north of the Alps; including the Barbara Baths, the Trier Imperial Baths, and the Forum Baths, Trier; Trier Cathedral ( or Dom St. Peter), a Catholic church that dates back to Roman times; its Romanesque west façade with an extra apse and four towers is imposing and has been copied repeatedly; the Cathedral is home to the Holy Tunic, a garment said to be the robe Jesus was wearing when he died, as well as many other relics and reliquaries in the Cathedral Treasury; the Liebfrauenkirche (German for Church of Our Lady), which is one of the most important early Gothic churches in Germany, in some ways comparable to the architectural tradition of the French Gothic cathedrals; St. Matthias' Abbey (Abtei St. Matthias), a still-in-use monastery in whose medieval church the only apostle north of the Alps is held to be buried; St. Gangolf's church is the city's 'own' church near the main market square (as opposed to the Cathedral, the bishop's church); largely Gothic; Saint Paulinus' Church, one of the most important Baroque churches in Rhineland-Palatinate and designed in part by the architect Balthasar Neumann; two old treadwheel cranes, one being the Gothic "Old Crane" (Alte Krahnen) or "Trier Moselle Crane" (Trierer Moselkrahn) from 1413, and the other the 1774 Baroque crane called the "(Old) Customs Crane" ((Alter) Zollkran) or "Younger Moselle Crane" (Jüngerer Moselkran) (see List of historical harbour cranes). Museums Rheinisches Landesmuseum (an important archaeological museum for the Roman period; also some early Christian and Romanesque sculpture); Domschatzkammer (Treasury of Trier Cathedral; with the Egbert Shrine, the reliquary of the Holy Nail, the cup of Saint Helena and other reliquaries, liturgical objects, ivories, manuscripts, etc., many from the Middle Ages); Museum am Dom, formerly Bischöfliches Dom- und Diözesanmuseum (Museum of the Diocese of Trier; religious art, also some Roman artefacts); Stadtmuseum Simeonstift (history of Trier, displaying among other exhibits a scale model of the medieval city); Karl Marx House; a museum exhibiting Marx's personal history, volumes of poetry, original letters, and photographs with personal dedications. There is also a collection of rare first editions and international editions of his works, as well as exhibits on the