The early chapel was built in the 10th century or around 1000 AD, but it is known for certain that the ruins seen today belong to a chapel rebuilt in the 13th century. Earlier archaeological excavations suggest that the ruins still visible today were built on the site of a pre-existing rotunda.
An intriguing feature of the chapel is that, according to tradition, it was here that Prince St. Emeric took his vow of chastity. The chapel, which is functionally closely linked to the cathedral, became a place of great importance in the late Middle Ages as a place of pilgrimage and was even used for chaplaincy meetings.
The destruction of the chapel may have occurred as early as before the 18th century. Its walls were then rebuilt. However, its complete and authentic renovation could only have been possible with present-day techniques and a definite sacral purpose.
