Saint Wenceslas Chapel, Gothic sepulchral chapel in Prague Castle, Czech Republic

Saint Wenceslas Chapel is a Gothic chapel on a square plan in St Vitus Cathedral at Prague Castle, built by Peter Parler from 1344 to 1367. Its lower walls are set with polished Bohemian jaspers, amethysts and chrysoprases in gilded plaster frames, above which 1372–1373 Passion frescoes and the three-tiered Legend of St Wenceslas cycle cover the walls.

Prince Wenceslaus founded the rotunda of Saint Vitus around 930; his body, moved there around 938 by his brother Boleslaus I, lay in a horseshoe-shaped south apse. Charles IV had Peter Parler build the present square chapel between 1344 and 1367 above that grave, and in 1541 fire destroyed much of the tomb and furnishings.

The chapel's walls carry the Wenceslas legend cycle, painted in three tiers and attributed to the circle of the Master of the Litoměřice Altarpiece, with the Diet of Regensburg as its central scene. Above the altar niche, kneeling portraits of Charles IV and his fourth wife, Elizabeth of Pomerania, were repainted in the 1470s.

Visitors reach the chapel through Prague Castle's ticketing system, which offers different admission options for various areas. The best time to visit is early in the morning when there are fewer people and natural light illuminates the gems and frescoes more clearly.

The Crown Chamber above the chapel is reached by a door on the west side, locked with seven keys held by the president, prime minister, parliamentary leaders, Prague mayor, archbishop and cathedral chapter. They assemble to open it when the crown jewels are shown.