Even before a single-screen In-Mall cinema had made its debut, there were plans for an In-Mall "twin cinema" prototype. But allow us to regress a bit. As far as can be determined, the earliest twin cinema in the nation, the Duplex Theatre, opened in Detroit, Michigan in 1915.
Zooming back the the early 1960s, America's first Shopping Mall Twin Cinema opened, in Peabody, Massachusetts, in May 1963. The At-Mall Cinema I & II was built as an outparcel of the NORTHSHORE CENTER mall, which had been officially dedicated in 1958.
Cinema I & II was built by a Boston-based theater operator. Founded as Midwest Drive-Ins in 1938, it morphed into the aforementioned General Drive-In Corporation in 1960 and General Cinema Corporation Theatres, Incorporated (or GCC) in 1964.
In July 1963, the nation's first In-Mall twin cinema showed its first features. The Ward Parkway Twin, conceived and built by Kansas City, Missouri's American Multi-Cinema Corporation (AMC), was added to Kansas City's WARD PARKWAY CENTER mall, which had been completed in 1962.