The Cathedral of Trier, also known as Trier Cathedral, is a Roman Catholic church located in Trier, Germany. It is one of the oldest cathedrals in the country, with its origins dating back to the 4th century. The cathedral showcases a mix of architectural styles, including Romanesque and Gothic, reflecting its long history and various renovations. The cathedral is home to several important relics, including the Holy Robe, believed to be the garment worn by Jesus Christ. It was designated a UNESCO World Heritage Site in 1986, highlighting its cultural and historical significance in Europe.