The church building was situated on the present-day Domplein [nl] and was demolished during the Protestant Reformation, after the 1587 outlawing of Catholicism in the Dutch Republic.

During World War II, the former church building location was subject to an archaeological excavation.

At the site of the former crossing, on the axis of the church, wall remnants and limestone sarcophagi were found.

By studying the groundplan of the second church which included a very broad and extremely short nave and a heavy tower, the dimensions of the connecting hall were deduced.

The excavation showed that the annex, which contained many tombs within its walls, may have been a grave chapel and possibly a choir.

Bishop Frederick of Utrecht, who was murdered in the church in 835, according to legend for his criticism of Empress Judith of Bavaria, was buried in front of this altar.

This immunity also extended to the houses of the canons and the Holy-Cross chapel, which, as stated above, can be identified as the original St. Martin's church, and was eventually rebuilt as a cathedral by Bishop Balderic of Utrecht.

In its final form, the St. Salvator church was a Tuff-stone basilica with a deep choir, a transept and short nave, and a westwork with two towers.

A map and construction drawings of the church in its final form were made by Aernout van Buchel.

Today one can see the outlines of the choir and part of the transept in the paving of the Domplein, the square in front of the Dom Church.