The Central Archives, the largest branch of the City of Ottawa Archives, is in the James K. Bartleman Centre. It has four climate-controlled vaults, a conservation lab, a reference room and a gallery. The 8,500-square-metre (92,000-square-foot) state-of-the-art facility opened to the public in June 2011, and won the Ontario Association of Architects Award for Design Excellence in May 2012. It received LEED Gold certification (2012) as well as the Archives Association of Ontario Corporate Award. It has been designed with various energy-saving technologies. Renewable materials have also been used (such as bamboo and glass). The building design uses these materials and installation techniques to minimize off-gassing and damage to the archival materials. It is the most energy-efficient archives in Ontario. Researchers can search the historical collections and have access to the collections kept in the vaults. The reference room features a non-circulating library with books about local history and our partner organizations' libraries. The collection currently consists of 20 km (12.4 miles) of records, close to three million photographs, and thousands of plans, maps and drawings. The earliest records (land records) date from the late 17th century. The archives collects records from the City of Ottawa itself, as its primary collection, as well as the records of private individuals, organizations and community groups. It also features exhibitions at the Central Archives and City Hall, as well as virtual exhibits online. As part of Digital Doors Open, learn more about this site through the video below, or explore their many online research tools.