The history of this little church dates back to 1543 and the building of a chapel on the site to commemorate the martyrdom of a group of 14th-century Franciscan friars. Slowly added to over the centuries, including the attached Bonifratri Monastery, it's now mostly Late Baroque in appearance with a few Rococo flourishes and is the only church in Vilnius converted from an ordinary house. The interior's worth seeing if it's not locked, the most outstanding feature being the painting Holy Virgin Mother of Snow on the high altar.