Construction is under way on a 22-story, $22 million office building in the heart of Rosslyn. The Rosslyn Center will include 336,000 square feet of office space, 55,343 aquare feet of retail space, enclosed parking for 500 cars. The building will be connected to the new Metro station.

The developer of what will be the tallest and largest building in Rosslyn. Just across Key Bridge from Georgetwon, is Rosslyn Center Associates. The joint venture includes International Developers, Inc. (which is headed by Guiuseppe Cecchi) and Stanley R. Zupnik. He heads Majestic Builders Corp., general contractor for the project on Wilson Boulevard, between N. Fort Myer Drive and N. Moore Street.

National Savings & Trust Co. and First national Bank of Chicago are financing the construction. The permanent finnancing has been committed by the General Electric Pension Trust.

Abel / Weinstein designed the cast stone and tented insulated glass building to have three levels of shopping concourse connecting to Metro in Rosslyn. Also, the building will be the terminus for the pedestrain system that provides elevated walkways between most of the 3.7 million square feet of existing office space.

Carl Kneessi, a vice president of Weaver Bros., Inc., which will handle Rosslyn Center, said that occupancy is scheduled for January, 1979. The project leasing rate of $10 to $10.50 a square foot about $2 higher than the current rates for existing space in Rosslyn. CAPTION: Picture, An architect's sketch of the 22-story, $22 million Rosslyn Center. Ives & Associates