The convent of St. Cyriacus is one of the most important examples of Ottonian architecture. The western part, with its two towers, high central block and apse, was built in the 12th century. In the 11th century, the Holy Tomb was installed in the southern side aisle some time after the church had been built; this is the earliest surviving example in Germany of a copy of Christs tomb in Jerusalem. There is a 16th century portrait of the founder, Margrave Gero. The life of Christ is depicted on the octagonal font. Guided tours daily at 3 pm except Good Friday, Christmas Eve and New Years Eve. Group tours also possible at other times by arrangement.