St. Peter's Basilica is the largest church in the world (23,000m², capacity 60,000 people), built on the site where St. Peter (the first Pope) was crucified upside-down and buried in 64 AD. It took 120 years and 20 popes to build (1506-1626). Bramante started the design. Raphael modified it. Michelangelo redesigned the dome at 71 years old. Bernini added the bronze baldachin and the colonnade. The result: a building so vast that it contains other churches inside it — chapels the size of cathedrals, a dome that reaches 136m (taller than any other dome until 1960), and Michelangelo's Pietà behind bulletproof glass since 1972. And it's FREE to enter. Vatican complete guide →
Plan my Vatican visit →1. Michelangelo's Pietà (first chapel on the right). Mary holding the dead Christ — carved by Michelangelo at 24 years old (1498-1499). The marble looks soft. The fabric folds look real. The grief is quiet and devastating. Behind bulletproof glass since 1972 (a mentally ill man attacked it with a hammer, damaging Mary's nose and arm). The restoration is nearly invisible. It's the first thing you see when you enter — and the thing you remember when you leave.
2. Bernini's Baldachin (over the main altar). A 29-meter-tall bronze canopy (1624-1633) over the papal altar, directly above St. Peter's tomb. Made from bronze stripped from the Pantheon's portico ("what the barbarians didn't do, the Barberini did" — a famous Roman pasquinade about Pope Urban VIII Barberini). The twisted columns are designed to make you look UP — toward Michelangelo's dome.
3. Michelangelo's dome (interior view from the floor). Look up from under the baldachin. The dome rises 136m. Gold mosaics depict Christ, Mary, saints, and angels in concentric circles that get smaller as they rise — creating an optical illusion of infinite height. The Latin inscription around the base (1.4m letters, 2m high): "TV ES PETRVS ET SVPER HANC PETRAM AEDIFICABO ECCLESIAM MEAM" — "You are Peter, and on this rock I will build my church."
4. St. Peter's Throne (Cathedra Petri). At the far end — Bernini's bronze and gold glory (1657-1666). A bronze chair (encasing a wooden chair tradition says St. Peter sat in) held aloft by 4 massive bronze Church Fathers, surrounded by golden rays of light streaming from a stained glass window with the Holy Spirit dove. The most theatrical piece of furniture in history.
5. Vatican Grottoes (below the basilica). Free entry (exit through the basilica). Papal tombs from the last 500 years, including John Paul II (now moved upstairs after canonization), Benedict XVI, and numerous Renaissance/Baroque popes. Also accessible: the Necropolis (Scavi tour, €13, book months ahead at scavi.va) — the actual Roman cemetery under the grottoes where St. Peter's tomb was found in 1942.
551 steps to the top. Or: elevator to the first terrace (roof level, €10) + 320 steps from there (€8 for all stairs). The climb gets narrow: the final 320 steps spiral between the dome's inner and outer shells — the walls curve inward, the staircase tilts, and at shoulder-height you pass Vasari's mosaics 3 meters from your face. The lantern view (top): all of Rome + the Vatican Gardens + Bernini's colonnade from directly above. Claustrophobics: the narrow section is genuinely challenging. Worth it: absolutely. Open 8am-6pm (5pm winter). Go at 8am for shortest queue.
Entry: FREE. No ticket needed. Queue: 15-60 min depending on season (security screening). Hours: 7am-7pm (6:30pm winter). Dress code: Shoulders and knees covered — strictly enforced. No tank tops, shorts above knee, or bare shoulders. Carry a scarf. Mass: Papal Mass Sundays 10:30am in the piazza (free, arrive 7am for position). Daily Mass inside the basilica (multiple times, check vatican.va). Audio guide: €5 at the entrance — worth it for understanding the art.