The Liberty Mutual Tower, located at 157 Berkeley Street, is a skyscraper in the Back Bay neighborhood of Boston, Massachusetts.

The 22-story building houses the world headquarters of Liberty Mutual Insurance Group, standing 290 feet (88 m) tall.

The tower cost more than $300 million, and is built in the shape of a triangle, similar to the Flatiron Building.

The building's outer appearance is traditional, but the interior is finished with modern architectural touches.

[3] A stainless steel abstract sculpture, entitled "Uplift" by New York artist Mia Pearlman,[4] is located outside at street level in front of the building's triangular point, with related sculptural elements visible inside the building lobby.