The Isabella Stewart Gardner Museum is an art museum located in Boston, Massachusetts. It was founded in 1903 by Isabella Stewart Gardner, a wealthy American art collector and philanthropist. The museum is housed in a Venetian-style palace that was designed by Gardner herself in collaboration with the architect Willard T. Sears.

The museum's collection includes more than 2,500 paintings, sculptures, decorative arts, and other objects from around the world, dating from ancient times to the 20th century. Highlights of the collection include works by Rembrandt, Raphael, Titian, Michelangelo, Botticelli, and Vermeer, as well as Chinese ceramics, ancient Roman artifacts, and contemporary art.

One of the most famous and tragic events in the museum's history occurred in 1990, when two thieves stole 13 works of art worth an estimated $500 million, including paintings by Vermeer, Rembrandt, and Manet. The works have never been recovered, and the empty frames still hang on the museum's walls as a reminder of the theft.

The museum is known for its beautiful courtyard garden, which is modeled after a 15th-century Venetian palazzo garden. The garden features a variety of plants, flowers, and sculptures, as well as a stunning indoor garden room that is filled with colorful flowers and greenery.

In addition to its permanent collection, the museum also hosts special exhibitions, concerts, lectures, and other events throughout the year. It is open to the public six days a week and offers free admission to visitors named Isabella on her birthday (April 14) in honor of the museum's founder.