An increasing share of these students came to the school from outside the National Capital Region, prompting the University to open its first purpose-built residence halls, Lanark and Renfrew Houses in the fall of 1962. The residences were initially segregated by sex, with Lanark House reserved for male students and Renfrew for female students. However, Carleton did away with the practice of mandatory sex segregation in 1969 in favour of co-educational housing, becoming the first university in North America to adopt this practice. By the end of the decade, the increased need for space to accommodate the growing faculty and student body saw the completion of several major academic buildings, including the Loeb Building in 1967 and the Mackenzie Building in 1968.