city centre was severely damaged, especially in November and December 1940, when the Broadmead area was flattened, and Hitler claimed to have destroyed the city. The original central area, near the bridge and castle, is now a park featuring two bombed-out churches and fragments of the castle. A third bombed church has been given a new lease of life as the St Nicholas' Church Museum. Slightly to the north, the Broadmead shopping centre was built over bomb-damaged areas. Clifton Cathedral, to the north of the city centre, was built during the early 1970s. Like much of British post-war development, the regeneration of Bristol city centre was characterised by Modernist architecture including Brutalist towers such as Castlemead - one of several notable examples of brutalist architecture in the city, and improvement and expansion to road infrastructure. The world's oldest shot tower in Redcliffe was lost to road development in 1968, being replaced the following year by the Cheese Lane Shot Tower on a different site. Since the 1990s this trend has been reversing, limiting access with the closure of a number of main roads, whilst the Broadmead shopping centre has been further developed. In 2006, one of the city centre's tallest Mid-Century Modern towers was lost, with further historic 20th century structures being destroyed more recently. The transfer of the docks to Avonmouth, 7 miles (11 km) downstream from the city centre, relieved congestion in the centre of Bristol and allowed substantial redevelopment of the old central dock area (the Floating Harbour). The continued existence of the central docks was for some time in jeopardy, as they were seen to be remnants of a derelict industry instead of an asset to be developed for public use. In the 1990s, a harbourside concert hall designed by architects Behnisch & Partners was planned, but an Arts Council decision cut the funding and the project has not been revived. This has left We The Curious (formerly At-Bristol), which mixes art, science and nature, with its all-reflective planetarium, as the centrepiece of the Harbourside development. 21st century The Broadmead shopping centre was redeveloped in the early years of the century, involving the demolition of one of the city's tallest mid-century towers, Tollgate House, in the construction of Cabot Circus. The former Bristol and West Tower was reworked into a glass skyscraper with glass panels in place of its concrete outer cladding. In 2005, the city