Edward Allen, longtime professor of architecture, passed away from complications of Parkinson’s disease on July 7 in Wayland, Massachusetts. He was 81 years old. An architect by training, Allen was the author of bestselling books for architecture students and practitioners. A faculty member in the MIT Department of Architecture from 1968 to 1983, his research and teaching focused on building materials and construction, as well as structural design. Allen was particularly known for embracing technical constraints in architectural design, and many of his 10 published books are still used in…