This is a private home. Perched atop the rocky coast of New London, CT, and seemingly at the base of the iconic New London Harbor Light, the “Castle House” stands as one of the most significant examples of 1960s residential design in a state known for such style houses. The Castle House was completed in 1964 from plans by German-born architect Ulrich Franzen (1921-2012), who attended the Harvard Graduate School of Design after his service in WWII. After graduating, Franzen worked under I.M. Pei, until he formed his own firm, Ulrich Franzen & Associates, in 1955. The residence's signature element is its dramatic free-floating glass living room pavilion at the rear with cantilevered paraboloid vaults and flanking service wings, with a jaw-dropping cypress butterfly ceiling. Additionally, the oval pool sits over the harbor water and provides the best possible views of the 1801 lighthouse towering above. The house was recently updated by SchappacherWhite, a design firm who are known for their thoughtful Mid-Century Modern house preservation projects.