The I.M. Pei-designed Third Church of Christ, Scientist complex was composed of two buildings connected by a central triangular grass plaza. The two buildings -- the five-story octagonal Third Church and the eight-story L-shaped Monitor Building -- were linked visually through materials, design, construction method and orientation on the site, giving the complex a unified aesthetic. Both buildings were constructed in the Brutalist style, characterized by their use of roughly cast-in-place concrete. An innovative horizontal sculptural "bell tower," extended outward from the east facade towards 16th Street. Despite extensive efforts by preservationists to designate the Church a local landmark, the building was demolished in 2014.
