Observatory is a Suburb in Johannesburg's east (Region F] the former Region 7); it borders the suburbs of Houghton Estate, Cyrildene, Linksfield, Bellevue, Bellevue East and Dewetshof. It is named for the Union Observatory established in the early 1900s (today's Johannesburg Observatory], sited on Observatory Ridge, the city's highest point. It is a well established suburb: Observatory Girls' Primary]was founded in 1918, and Observatory Golf Course](1912) is the oldest golf club in Johannesburg still operating from its original ground. The suburb also houses the Yeshivah Gedolah of Johannesburg.