Monday to Thursday: 8am - 7pm (last entrance at 5 pm)
Friday and Saturday: 8am - 8pm (last entrance 6 pm)
Last Sunday of the month: 9am - 2pm (last entrance 12:30pm).
Best time to visit: For a less crowded experience at the Sistine Chapel, consider visiting early in the morning by arriving before it opens or around 1 pm on weekdays. It's also advisable to skip the last Sunday of the month when admission is free, as it tends to attract larger crowds.