WATERVILLE — The expanded Colby College Museum of Art won’t open until July, but museum director Sharon Corwin offered a press preview Monday afternoon.

The Alfond-Lunder Family Pavilion is mostly completed. Just a few construction details remain, and Corwin and her staff have begun installing art works.

Additional Photos

Colby College Museum of Art director Sharon Corwin leads a tour of the soon-to-open Lunder Pavilion on Monday, March 25, 2013. Bob Keyes/Staff Writer

Colby College Museum of Art director Sharon Corwin describes the layout of a gallery on Monday, March 25, 2013. In foreground is a painting by Rockwell Kent. Bob Keyes/Staff Writer

The exterior of the Alfond-Lunder Family Pavilion at the Colby College Museum of Art, with the college's older architecture reflected. Bob Keyes/Staff Writer

The pavilion will house the recently donated Lunder Collection, valued at more than $100 million. The collection includes more than 500 objects, most by American masters such as George Inness, Winslow Homer, Edward Hopper and Georgia O’Keeffe. The new wing will open July 14.

Longtime museum supporters Peter and Paula Lunder donated their private collection to the college.

When the Lunder Pavilion opens, the Colby museum will be Maine’s largest, with 38,000 square feet of gallery space.

“It’s a gift to the state of Maine,” Corwin said.