Tripolitsa, Greece, is captured by Greek rebels during the Greek War of Independence.

The siege of Tripolitsa or fall of Tripolitsa, also known as the Tripolitsa massacre, was an early victory of the revolutionary Greek forces in the summer of 1821 during the Greek War of Independence, which had begun earlier that year, against the Ottoman Empire. Tripolitsa was an important target, because it was the administrative center of the Ottomans in the Peloponnese.