Known as "Domenica al Museo" (Sunday at the Museum), this initiative by the Italian Ministry of Culture allows free admission to all state-owned museums, archaeological parks, and cultural sites on the first Sunday of every month. In 2026, this includes world-renowned sites such as the Colosseum, the Pantheon, the Uffizi Gallery in Florence, and the ruins of Pompeii. It is a fantastic way to save on entrance fees, which can otherwise range from €15 to €25 per person. However, these days are notoriously crowded, and many popular sites now require you to "book" a free timed-entry slot online in advance to prevent overcrowding. It is strictly for state-run sites; private museums or those owned by the Vatican (like the Vatican Museums) typically do not participate or may have their own separate "free days" on different dates.