paragraph_text: Dallam Tower is a grade I listed country house in Beetham parish, near Milnthorpe, South Lakeland, Cumbria, England. It is a member of the Historic Houses Association but is not open to the public except for occasional charity events, visits to the garden through the National Gardens Scheme, and as a wedding venue.

paragraph_text: Palasport di San Siro was an indoor arena in Milan, Italy. It was primarily used for basketball and volleyball until the PalaSharp opened in 1985. The arena held 18,000 spectators and opened on 31 January 1976. On January 17, 1985, a large snowfall collapsed the roof and the arena was closed.

paragraph_text: Cullen Gardens & Miniature Village was a popular tourist attraction in Whitby, Ontario, Canada. Officially opened in May 1980 by founder Len Cullen and his wife, Connie, the Gardens were a major tourist attraction in Whitby for 25 years.

paragraph_text: The library is based at two public sites: the Reading Room at the RIBA's headquarters, 66 Portland Place, London; and the RIBA Architecture Study Rooms in the Henry Cole Wing of the V&A. The Reading Room, designed by the building's architect George Grey Wornum and his wife Miriam, retains its original 1934 Art Deco interior with open bookshelves, original furniture and double-height central space. The study rooms, opened in 2004, were designed by Wright & Wright. The library is funded entirely by the RIBA but it is open to the public without charge. It operates a free education programme aimed at students, education groups and families, and an information service for RIBA members and the public through the RIBA Information Centre.

paragraph_text: Mehan Garden is an open space in Manila, Philippines. It was established in 1858 by the Spanish colonial authorities as a botanical garden, called the "Jardín Botánico", outside the walled city.

paragraph_text: The building housed the department store Derry and Toms until 1973, and then Biba until 1975. Since the 1980s the garden has been used as a restaurant and club.

paragraph_text: The Georgeson Botanical Garden is located at 117 West Tanana Drive on the University of Alaska Fairbanks campus in Fairbanks, Alaska, United States. The five acre garden hosts a variety of research and educational programs in subarctic horticulture. It is open to the public during daylight hours, May through September, for a fee. It is part of the Alaska Agricultural and Forestry Experiment Station. The garden was named after Charles Christian Georgeson, who was USDA Special Agent in Charge of Alaska Investigations in 1899. Dr. Georgeson arrived in Alaska during the Gold Rush to research the possibilities for agriculture in Alaska. He surveyed the land near Fairbanks and started the Fairbanks Experiment Farm. A portion of the land was later annexed for use as the first campus of the University of Alaska.

paragraph_text: Garvan Woodland Gardens is a 210-acre (850,000 m²) botanical garden located at 550 Arkridge Road, approximately 6 miles from Hot Springs National Park in Hot Springs, Arkansas, United States. Owned by the University of Arkansas, it has the stated mission of education, research and public service. For an admission fee, it is open daily, except on Thanksgiving Day, Christmas Day and the month of January.

paragraph_text: The National Orchid Garden, located within the Singapore Botanic Gardens, was opened on 20 October 1995 by Singapore's Minister Mentor Lee Kuan Yew.

paragraph_text: In 2006, the Yankees began building a new $2.3 billion stadium in public parkland adjacent to the stadium. The price included $1.2 billion in public subsidies. The design includes a replica of the frieze along the roof that was in Yankee Stadium. Monument Park, a Hall of Fame for prominent former Yankees, was relocated to the new stadium. Yankee Stadium closed following the 2008 baseball season and the new stadium opened in 2009, adopting the ``Yankee Stadium ''moniker. The original Yankee Stadium was demolished in 2010, two years after it closed, and the 8 - acre site was converted into a park called Heritage Field. The new Yankee stadium opened in 2009 and is currently used by the NY Yankees.

paragraph_text: The Jardin botanique de Sedan is a botanical garden and city park located on Philippoteaux Avenue beside the Place d'Alsace-Lorraine, Sedan, Ardennes, Champagne-Ardenne, France. It is open daily without charge.

paragraph_text: Presby Memorial Iris Gardens is a nonprofit, volunteer-run living museum specializing in iris flowers, located at 474 Upper Mountain Avenue, Montclair in Essex County, New Jersey, New Jersey, United States. The gardens are situated on 6.5 acres. Adjacent to the gardens is a Victorian house, the Walther House. The house is open to the public and is home to a museum shop and headquarters for the Citizens Committee that oversees the gardens.

paragraph_text: The Ballarat Botanical Gardens Reserve, located on the western shore of picturesque Lake Wendouree, in Ballarat, Victoria, Australia, covers an area of 40 hectares which is divided into three distinct zones. The central Botanical Gardens reserve in the 'gardenesque' style of the Victorian pleasure garden. On either side there are open parkland buffers known as the North and South Gardens. The Gardens celebrated its sesquicentenary (150 years old) in 2007.

paragraph_text: Elven C. Smith House is a historic home located at Williamson, Mingo County, West Virginia. It was built in 1938, in a Neo-Classical Revival / Georgian Revival style. It is a red brick building with a hipped roof and features a two-story, flat roofed portico supported by fluted columns. Also on the property is a stone retaining wall and monumental stairway in the landscaped gardens.

paragraph_text: Wright was born in Kensington, London and moved to Wembley with his family at the age of five and attended St George's School, Harpenden. He began musical studies at the Royal College of Music, but interrupted his studies to serve in the British Army in Macedonia during World War I.

paragraph_text: The 11th Toronto International Film Festival (TIFF) took place in Toronto, Ontario, Canada between September 4 and September 13, 1986. "The Decline of the American Empire" by Denys Arcand was selected as the opening film. It won People's Choice Award at the festival and later got nominated for Best Foreign Language Film at Oscars.

paragraph_text: Another important library – the University Library, founded in 1816, is home to over two million items. The building was designed by architects Marek Budzyński and Zbigniew Badowski and opened on 15 December 1999. It is surrounded by green. The University Library garden, designed by Irena Bajerska, was opened on 12 June 2002. It is one of the largest and most beautiful roof gardens in Europe with an area of more than 10,000 m2 (107,639.10 sq ft), and plants covering 5,111 m2 (55,014.35 sq ft). As the university garden it is open to the public every day.

paragraph_text: Highline Botanical Garden is a community botanical garden located at 13735 24th Avenue South, SeaTac, Washington. It is open daily without charge.

paragraph_text: The Cleveland Botanical Garden, located in the University Circle neighborhood of Cleveland, Ohio, in the United States, was founded in 1930 as the Garden Center of Greater Cleveland. It was the first such organization in an American city. Originally housed in a converted boathouse on Wade Park Lagoon, the center served as a horticultural library, offering classes and workshops for gardeners and spearheading beautification projects in the community. In 1966, having outgrown its original home, the Garden Center moved to its present location in University Circle, the site of the old Cleveland Zoo. Remnants of the old bear pit still remain in the Ohio Woodland Garden. In 1994, the organization's Board of Trustees changed the name to Cleveland Botanical Garden to reflect a dramatically expanded mission and launched an ambitious capital campaign to develop a facility that would support the enhanced program agenda. The expanded and renovated building, designed by Graham Gund Architects of Cambridge, Massachusetts, opened to the public in July 2003.

paragraph_text: In 2004, the two institutions created the Architecture Gallery (Room 128) at the V&A showing artefacts from the collections of both institutions, this was the first permanent gallery devoted to architecture in the UK. The adjacent Architecture Exhibition Space (Room 128a) is used for temporary displays related to architecture. Both spaces were designed by Gareth Hoskins Architects. At the same time the RIBA Library Drawing and Archives Collections moved from 21 Portman Place to new facilities in the Henry Cole Wing at the V&A. Under the Partnership new study rooms were opened where members of the public could view items from the RIBA and V&A architectural collections under the supervision of curatorial staff. These and the nearby education room were designed by Wright & Wright Architects.

Question: When did the roof gardens above Denis Wright's birthplace open to the public?
Answer: 1980s