Abstract: An architectural panel system including a plurality of architectural panels, a first mounting extrusion attached to a first architectural panel, and a second mounting extrusion attached to a second architectural panel, as well as a first anchor clip including a first attachment configuration that enables the first mounting extrusion to be slidably attached thereto, and a second anchor clip including a second attachment configuration that enables the second mounting extrusion to be slidably attached thereto. The system also includes a panel joint filler strip. The first mounting extrusion includes a first pocket portion, and the second mounting extrusion includes a second pocket portion that is shallower than the first pocket portion. The first and second pocket portions cooperate with each other to seat the panel joint filler strip. Also disclosed are methods of installing the panel system and of replacing a damaged panel of an installed array of panels.