now houses: Cardiff University, which moved from Newport Road to Cathays Park in 1909 National Museum Cardiff, opened in 1927 Welsh National War Memorial, unveiled in 1928 Crown Buildings, the Welsh Government's main offices in Cardiff; the largest building in Cathays Park Temple of Peace and Health (usually known as the Temple of Peace), opened in 1938 Maindy Pool was a clay pit that had gradually filled with water. After the death by drowning of ten children and adults, it was filled in by using it as a rubbish tip. In 1948 the building of Maindy Stadium began on the same site, completed in 1951, which held cycling races in the 1958 British Empire and Commonwealth Games. When the stadium was closed and replaced with a leisure centre, part of the site became a swimming pool. Cathays Library is a Carnegie library built in 1906 and refurbished in 2009–10. Companies House, which holds the registration records of all companies registered in England or Wales, has its headquarters in Cathays. Today The area of Cathays, given its proximity to most of Cardiff University's teaching sites and the University Hospital of Wales, has seen a dramatic fall in owner-occupation, with a high proportion of houses in multiple occupation (HMOs) which are let through private landlords and letting agencies to the large student population. 2012 figures available under the Freedom of Information Act show that over 70% of the houses in Cathays were then HMOs. The buy-to-let market has deterred young couples, families and first-time buyers from setting up home in the area. Cathays High School is an 11-18 mixed comprehensive school that started as a boys' grammar school in 1903 and became a comprehensive high school in 1973. Despite the urbanisation of Cathays, there is extensive parkland around the civic centre, including Gorsedd Gardens, Queen Alexandra Gardens, Bute Park and Blackweir. Of more than 8570 wards in the 2011 census across England and Wales, Cathays ranked 8th lowest in the number of retired people and second lowest in Wales (behind Menai, a ward associated with Bangor University). Transport The area is served by Cathays railway station in the east, with frequent services south to Cardiff Queen Street and Cardiff Central or north to Aberdare, Merthyr Tydfil and Treherbert via Pontypridd. Cardiff Bus provides many services in the area. The following bus services run along North Road (in the west), going to the