Hosios Loukas is the Byzantine monastery in central Greece whose katholikon is decorated with famous 11th-century mosaics.
The monastery is located near Distomo in Boeotia, on the slopes of Mount Helicon. It developed around the hermit Luke of Steiris, who died in the 10th century. The principal church, the katholikon, was constructed in the 11th century and became a major monument of Middle Byzantine architecture.
Its interior combines mosaics, marble revetment, and architectural forms characteristic of the period. The church is especially noted for its dome, where Christ Pantocrator appears within the Byzantine visual program, and for the carefully organized hierarchy of sacred images.
Hosios Loukas is frequently grouped with Daphni and Nea Moni because all three preserve exceptional Byzantine mosaic decoration. They are separate monasteries, however, with different locations and architectural histories.