The chapel named after the patron of the Ljubljana Cathedral is the largest in the Garden of All Saints, designed as a composition of a central rectangular block joined with a smaller one. The ground part is rustic and the upper is covered by smooth plaster. Large side windows bring to mind the winter garden of Plečnik's house in Trnovo, and the front and back sides are ornamented with two large rosettes. The ground floor of the chapel features brick pilasters and the walls of the same material. Above the frieze are rows of three pillars in front of glass walls. Besides its size, the chapel is also exceptional because of the simple geometrical patterns decorating the terrazzo. On the wall opposite the entrance is a table painting of Christ with Mary and John the Evangelist, following the model of Italian painted crosses.