Capella Tower (also 225 South Sixth) is an office skyscraper in Minneapolis, Minnesota, United States.

In February 2005, the IDS counted a 16-foot-tall (5-meter) window washing garage built on its roof in 1979 as part of its actual height, making it 14 ft (4.3 m) taller than Capella Tower.

The IDS's communications spires add a significant amount of height making it 910 ft (280 m), and it remains the tallest building in Minneapolis if measured by number of stories (57 vs. 56; actually tied for first with neighbor Wells Fargo Center).

[2] Capella Tower is connected to the Minneapolis Skyway System and has 1.4 million square feet (130,000 m2).

The illuminated semicircle located atop the tower is not only decorative but also houses an antenna farm and communications network.