Under Andrea II's rule, the principality reached its greatest extent, covering the regions of Myzeqe, Berat, Tomorricë, Skrapar, Këlcyrë, Përmet, Opar, Devoll, Kolonjë, and Kastoria.

Teodor received Berat and Myzeqe, while Stoya inherited Kastoria along with its associated villages and estates.

The frescoes are remarkable for depicting for the first time in Byzantine iconography, Jesus Christ and the Virgin Mary in imperial costume.

The church influenced greatly the artistic production of Kastoria and Western Macedonia in the late 14th and early 15th century.

Following his death, control of Kastoria and all the villages and estates belonging to it passed to his older brother, Gjin Muzaka.