The Medici Chapels blend Renaissance and Baroque styles. Divided into two sections-the New Sacristy and the Chapel of the Princes-they honor the Medici dynasty’s legacy through art and architecture. Both spaces reflect the family’s wealth and influence, serving as grand mausoleums and artistic landmarks.

The New Sacristy combines classical and Renaissance elements. Its cubical layout features a dome, white walls, and gray pietra serena stone. The tombs display Michelangelo’s sculptures-Day, Night, Dawn, Dusk-symbolizing time’s passage. Though unfinished, Giorgio Vasari later completed the work, preserving its dramatic contrast and emotional depth.

Built by Matteo Nigetti, this Baroque chapel dazzles with colorful marbles and semi-precious stones. Its octagonal design, crowned by a 59-meter dome, houses six grand sarcophagi for Medici rulers. The Opificio delle Pietre Dure workshop crafted intricate inlays, transforming the space into a glittering tribute to Medici power and craftsmanship.

Together, the chapels celebrate the Medici family’s patronage and Florence’s artistic genius. Michelangelo’s innovative designs and the Chapel’s lavish materials highlight Renaissance-Baroque transitions. They remain enduring symbols of wealth, devotion, and the era’s mastery of architecture and decorative arts.

The New Sacristy, designed by Michelangelo, is a mausoleum that serves as the final resting place for members of the Medici family. It features sculptures by Michelangelo, including the Dawn, Dusk, Day, and Night figures, which adorn the tombs of Giuliano and Lorenzo de' Medici. The chapel is in line with Brunelleschi's Old Sacristy architecturally but remains unfinished due to Michelangelo's departure from Florence, leaving Lorenzo and Giuliano's remains without grand tombs.

This grand octagonal mausoleum is renowned for its lavish interiors, adorned with marble, granite, jasper, and semi-precious stones. It houses the sarcophagi of six Medici Grand Dukes and their wives. The dome, designed by Buontalenti, is about 60 meters high and features frescoes illustrating scenes from the Bible. The chapel is a testament to the wealth and influence of the Medici family, and an example of Baroque architecture, a style that was less common in Florence at the time.

Located beneath the Medici Chapels, the Medici Crypt houses the tombs of several members of the Medici family, including some of the Grand Dukes of Tuscany and their wives. The crypt is part of the complex that includes the New Sacristy and the Chapel of the Princes, serving as a burial ground for lesser-known members of the Medici family. The crypt is noted for its solemn, plain yet impactful design, contrasting with the grandeur of the upper chapels.

The Lorraine Crypt is located behind the crypt altar, under the choir of the Basilica of San Lorenzo in Florence. It houses the remains of the Lorraine family, who succeeded the Medicis as rulers of Tuscany. The crypt was recently reopened to the public after restoration work, offering a glimpse into the history of the Lorraine dynasty and their connection to the Medici family.

The Reliquary Chamber houses exquisite sacred objects, including boxes containing holy relics made from precious silver and gold. These relics are associated with saints and martyrs, reflecting the Medici family's devotion to the church. Notable reliquaries include the one dedicated to St. John the Baptist and St. Cosimo, adorned with colored enamels. The chamber also features paintings by renowned artists like Botticelli and Ghirlandaio.