Karlskirche, Monastery church in Volders, Austria

Karlskirche is a monastery church west of Volders, built in its present form in 1710. Its central dome, 14.7 by 14 metres, is surrounded by three chapels, and the tower rises 42 metres above a circular plan with rounded bays. The facade niches hold figures of Saints Charles Borromeo, Frances Romana, Ignatius and Mary.

Construction began in 1620 but faced delays due to financial problems and the Thirty Years' War. The building was finally completed in 1654 after these obstacles were overcome.

The dome fresco, painted by Martin Knoller in 1765–66, shows Charles Borromeo kneeling in a purple cardinal's mantle before Christ, surrounded by the three divine virtues, the apostles and Mary. In the chapel of the Three Kings he appears distributing alms, and in the vestibule he is shown with the young Guarinonino. The high altarpiece of 1769, painted in Milan, depicts him giving communion to a plague-stricken woman; Knoller used his wife's face for hers and included himself among the figures.

The church stands west of Volders, next to the Servite monastery. The main entrance opens through a large vestibule; the chapels of the Sorrowful Mother and Saint Anne flank the entrance. The dome lantern's eight windows light the interior evenly. The nave is 50 metres long and 30 metres wide.

The church's founder, Hippolyt Guarinoni, worked on the building himself under the name Meister Pölten, labouring as a mason alongside the crew. The tower was planned far higher, but the master builder died before its completion and the Servites finished it in simpler forms, which is why it reaches 42 metres.