Philadelphia -- Simon Property Group announced Tuesday plans to unify the two main shopping venues of King of Prussia Mall, in King of Prussia, Pa., expanding one of America's most productive and iconic retail destinations.

The project will entail an enclosed multi-level expansion connecting the five-anchor, 1.7 million-sq.-ft. Plaza, and the two-anchor, 902,000-sq.-ft. Court. The 140,000-sq.-ft. expansion will include approximately 40 new retailers, several restaurants, an upscale dining pavilion and customer lounge. The timing of the project coincides with the upcoming 50th anniversary of the center.

"This expansion will not only enhance the shopping experience, providing an enclosed retail and amenity-filled link between the two properties, but also creates much needed additional space to accommodate the demand that exists for this property," said David Contis, president of Simon Malls.

Already underway is a major redevelopment of the center which will convert the former Strawbridge's building into a home for 10 new retailers in a two-story, 100,000-sq.-ft. space. This redevelopment is set to debut in time for next year's holiday season.