As of today it's the cemetery's chapel and also popular for weddings thanks to its location overlooking Kempratnerbucht at Kempraten lake shore.

Even the citizens of Rapperswil had to attend services in Busskirch until Count Rudolf II built his own parish church on the Herrenberg hill next to the castle.

On 24 November 1446 Ellsbetha, gräffin zu Togckenburg granted a benefice (Pfründe) in the amount of 800 Rheinische Gulden to the Allerheiligen altar of the church, sealed by Countess Elisabeth and certified by Schultheiss und Rat der Stadt Rapperswil.

Caecilia und Katharina» (Brotherhood of St. Cecilia and Catherine)[3] provides an enormous repertoire of church music for the parish among them around 1,000 compositions of the Rapperswil-born church musicians and composers Carl Greith (1828–1887) and his father Franz Josef Greith (1799–1869) who composed the Rütli anthem («Von ferne sei herzlich gegrüsst, du stilles Gelände am See»).

Collection campaigns in 1493/97 allowed to rebuild the hall church into a tripartite Gothic choir with arched ceiling and tracery windows.

[1] Advised by the art historian Johann Rudolf Rahn, the architect Xaver Müller rebuilt the largely destroyed building.