in the Moscow Kremlin. The magnificent iconostasis of the 16th–18th centuries features Simon Ushakov's masterpiece, the icon of Last Supper. The interior walls were painted with violet and blue frescoes by a team of Yaroslavl masters in 1684. The vault contains burials of Boris Godunov, his family and several 20th-century patriarchs. As the monastery grew into one of the wealthiest landowners in Russia, the woods where it had stood were cleared and a village (or posad) sprang up near the monastery walls. It gradually developed into the modern town of Sergiyev Posad. The cloister itself was a notable centre of chronicle-writing and icon painting. Just opposite the monastery walls St. Paraskeva's Convent was established, among whose buildings St. Paraskeva's Church (1547), Introduction Church (1547), and a 17th-century chapel over St. Paraskeva's well are still visible. 17th century In 1550s, a wooden palisade surrounding the cloister was replaced with long stone walls, featuring twelve towers, which helped the monastery to withstand a celebrated 16-month Polish-Lithuanian siege in 1608–1610. A shell-hole in the cathedral gates is preserved as a reminder of Wladyslaw IV's abortive siege in 1618. By the end of the 17th century, when young Peter I twice found refuge within the monastery from his enemies, numerous buildings had been added. These include a small baroque palace of the patriarchs, noted for its luxurious interiors, and a royal palace, with its facades painted in checkerboard design. The refectory of St. Sergius, covering and also painted in dazzling checkerboard design, used to be the largest hall in Russia. The five-domed Church of John the Baptist's Nativity (1693–1699) was commissioned by the Stroganovs and built over one of the gates. Other 17th-century structures include the monks' cells, a hospital topped with a tented church, and a chapel built over a holy well discovered in 1644. 18th and 19th centuries In 1744, Empress Elizabeth conferred on the cloister the dignity of a Lavra. The metropolitan of Moscow was henceforth also the Archimandrite of the Lavra. Elizabeth particularly favoured the Trinity and annually proceeded afoot from Moscow to the cloister. Her secret spouse Alexey Razumovsky accompanied her on such journeys and commissioned a baroque church to the Virgin of Smolensk, the last major shrine to be erected in the Lavra. Another pledge of Elizabeth's affection for the monastery is a white-and-blue baroque belltower, which, at 88 meters, was one of the tallest structures built in