In 2004, two predecessor buildings of the Saal Church were discovered during archaeological excavations on the Saalplatz. The older of these buildings is a so-called tri-apsidal church (Trikonchos), named after its three semicircular building ends, which resemble the shape of a cloverleaf remember. It is an ancient building with a reference to Byzantine architecture. The eleven metre long sacred building from the 8th or The 9th century was connected to the north wing. Recent research suggests that it was a stately private chapel. Later the chapel was demolished and another small church building was erected in its place, which was used as a chapel at least until the beginning of the 13th century. existed. In the 10th century the construction of the hall church took place in the immediate vicinity.
There are only a few remains of the trikonchos in the ground, so the shape and location were determined by using white travertine stones in the pavement. reconstructed.
Explanations on the history of the three sacred buildings in the Archaeological Zone Kaiserpfalz are available in the interior of the hall church.
