[3] Hans Rudolf Sennhauser wrote in 1990 that the shape of the crypt was inconsistent with a 1294 construction date.

Originally the canons followed the rules of the Institutio canonicorum Aquisgranensis, where they ate and lived together but could have private dwellings with their Bishop's permission.

The college of canons were supported by and consisted of foreign nobles, which often caused conflicts with the growing city of Solothurn.

The increasingly indebted Count Rudolf II of Neu-Kyburg prepared to raid Solothurn to force the city to forgive his debts.

[7] Angry residents of the city then murdered Hans von Stein in the church during a mass.

[8] Rudolf II's attempted raid on Solothurn gave Bern a reason to attack the Counts of Neu-Kyburg and caused the Burgdorferkrieg.

After the Mordnacht, the college began recruiting from the city council and conflicts reduced between the two groups.

On 25 March 1762 the Wendelstein tower collapsed forcing the city to begin planning to replace the building.

[11] In the following year, the city hired the architect Gaetano Matteo Pisoni (1713–1782) from Ascona to design and build a new church.

On 26 September 1773 the new church was dedicated by the Bishop of Lausanne, Joseph Niklaus von Montenach.

In January 2011, the free-standing altar in the choir and parts of the surrounding church were severely damaged by an arson attack by a 61-year-old Swiss man who had a history of mental illness.

The front is decorated with monumental statues and reliefs from the sculptor Johann Baptist Babel which were carved in 1774–75.

From north to south the figures are St. Stephan, Charles Borromeo, St. Mauritius, St. Verena, St. Victor, St. Ursus, St. Regula, St. Felix, St. Beatus and Niklaus von Flue.

The monumental staircase leading to the west facade is flanked by statues of Moses and Gideon atop Roman style fountains.

[16] The single bell tower is located on the north side of the choir and is topped with a copper onion dome.

It was delivered on 24 April 1772 by his son Karl Josef Maria Bosshard (1736–1795), as his father had died that year.