Chapelle Saint-Jean-Baptiste de Monaco, Royal chapel at Prince's Palace of Monaco, Monaco.

The Chapel of Saint-Jean-Baptiste, the palatine chapel of the Prince's Palace of Monaco, was built under Honoré II Grimaldi to replace an earlier oratory and consecrated on 15 October 1656 by the Bishop of Nice. Its facade carries frescoes by Jacob Froschle and Deschler of Augsburg, while the interior was painted by the Roman ceramicist Ernesto Sprega. Inside are a stained-glass window by Nicolas Lorin of Chartres showing Sainte Dévote before her judges, a painting of Sainte Dévote, a Virgin and Child above the main altar, and a silver cross made in 1810 by Montpellier goldsmith Xavier-Louis Dartis.

The chapel was built during the reign of Prince Honore II Grimaldi and replaced an earlier oratory on the site. It was consecrated by the Bishop of Nice in 1656 and became an important religious structure for the principality.

The chapel displays works by notable artists, with frescoes by Jacob Froschle and Deschler of Augsburg adorning its facade and paintings by Ernesto Sprega inside, reflecting the artistic heritage of the principality.

The chapel sits inside the Prince's Palace and is reached on foot through the palace's state rooms during the visiting season; the entrance is off the Palace Square in Monaco-Ville. Steps and narrow doorways mark the route, so allow extra time for stairs. Check locally before setting out, as the chapel shuts for religious services and palace events.

A precious silver cross crafted by master goldsmith Xavier-Louis Dartis in 1810 is among the chapel's notable religious artifacts. This artwork exemplifies the fine craftsmanship found in early 19th century metalwork.