Question: what chain of British department stores was built in 1961?

full_context: Document 1: Alhambra, Blackpool: The Alhambra was an entertainment complex in Blackpool, Lancashire, England, from 1899–1903. A financial disaster, the building was bought by the Blackpool Tower Company and reopened in 1904 as the Palace. The building was demolished in 1961 to make way for Lewis's department store.
Document 2: Royal Panopticon: The Royal Panopticon of Science and Art, to give the full title, was one of the grand social institutions and architectural splendours of Victorian London, that is now lost. It was given a Royal Charter in 1850 and in July 1851 a lease was taken out on a premium site for 60 years, and building could commence. The Panopticon was built on the eastern side of Leicester Square, opening on 18 March 1854. As a showcase venue for the very best achievements in Science and Arts of the time, it attracted 1,000 visitors per day. Two years later however it closed, obtained a licence for theatrical performances and was re-opened as the Alhambra Theatre. The site is now occupied by the Odeon Leicester Square.
Document 3: Blackpool Mecca: The Blackpool Mecca was a large entertainment venue on Central Drive in the seaside town of Blackpool, Lancashire, in North West England, first opened in 1965. In the 1970s, it was particularly known for The Highland Room, which was a major Northern Soul music venue. The building was closed down in 1980s and was finally demolished in January 2009 to make way for new campus buildings of Blackpool and The Fylde College. However, following an issue with funding B&FC withdrew and as of 2013 the site is planned for residential development.
Document 4: Lewis Textile Museum: The Lewis Textile Museum was bequeathed to the people of Blackburn by a local cotton industrialist, Thomas Boys Lewis (1869–1942). The Lewis Textile Museum was closed in 2006 and a new gallery with its collection of looms and textile machinery was moved to Blackburn Museum and Art Gallery. The gallery which now houses the exhibits at the main Museum & Art Gallery was named "CottonTown" and opened in April 2007 by Jack Straw, the local Labour MP.
Document 5: Blackpool Zoo: Blackpool Zoo is a 32 acre zoo, owned by Parques Reunidos and located in the sea-side resort of Blackpool, Lancashire, England. It provides a home to over 1,500 animals from all over the world. The zoo has recently changed ownership twice – once in 2003, and again in 2007, resulting in continued investment each year.
Document 6: Mecca Dance Hall Tottenham: For 94 years, 415–419 High Road Tottenham, London, N17 was a North London entertainment venue. The building started life as a roller skating rink in 1910 but the following year was refitted as the Canadian Rink Cinema. In 1925 it was converted into a dance hall known as the Tottenham Palais and became a popular jazz venue. Later it was bought by Mecca Leisure Group and became the Tottenham Royal, managed by William McLeish. North London’s premier nightspot for big band and swing music, with the Johnny Howard Band as resident for a period. The 1950s saw the Royal embrace the rock and roll era and there is a well-known photograph in Picture Post of a group of Teddy Boys in the dance hall. There was also a publicity shot taken outside the Royal when the Tottenham Hotspur League and Cup double team showed off their medals during a victory parade down the High Road in 1961. Throughout the 1960s bands such as the Dave Clark Five (based there), the Troggs, The Who and The Animals played at the Royal and the Kray twins were among the more notorious visitors. It had also become a modern style disco playing R and B music from America, Ska from Jamaica, as well as the latest pop hits. By the 1970s Tottenham had one of Europe’s biggest black communities and the Royal was host to regular soul and reggae nights as the dance hall became a focal point for local black youths (along with Club Noreik at Ward’s Corner at the junction of Seven Sisters Road and Tottenham High Road) with many reggae stars such as Desmond Dekker and Gregory Isaacs making appearances. In the mid 1970s Tottenham Royal, together with the nearby Charlie Chaplin's nightclub, plus other clubs such as Crackers in Wardour Street were all part of the up-and-coming UK disco and Southern Soul dance scene, with disco music interspersed with Glenn Miller swing music. This was a real multi-cultural experience with white and black youths attending just for the music and to dance. The 1980s saw a transformation into a string of new identities including the Mayfair Suite, the Temple, the United Nations Club, and the Zone, but its best days had passed and the garish and cavernous dance hall was finally demolished in 2004 to make way for much-needed local housing.
Document 7: House of Fraser: House of Fraser is a British department store group with over 60 stores across the United Kingdom and Ireland. It was established in Glasgow, Scotland in 1849 as Arthur and Fraser. By 1891, it was known as Fraser & Sons. The company grew steadily during the early 20th century, but after the Second World War, a large number of acquisitions transformed the company into a national chain. Between 1936 and 1985 over seventy companies, not including their subsidiaries, were acquired. In 1948, the company was first listed on the London Stock Exchange, and eventually was included in the FTSE Index before the company was acquired by a consortium of investors including Baugur and Don McCarthy in 2006. On 2 September 2014, Don McCarthy, retiring Executive Chairman of House of Fraser, announced the completion of the sale of 100% of the preferred ordinary shares and B ordinary shares, and approximately 89% of the A ordinary shares and preference shares of Highland Group Holdings Ltd, to Nanjing Xinjiekou Department Store Co, a leading chain of Chinese department stores, for an enterprise value of approximately £480 million.
Document 8: JJB Sports: JJB Sports plc (stylized as JJb sports) was a British sports retailer. On 24 September 2012, shares in JJB Sports were suspended, and the firm called in administrators. On 1 October 2012, it was announced that Sports Direct had purchased part of the business, including twenty stores, the brand, and its website for £28.3 million.
Document 9: Kaufmann's: Kaufmann's was a department store that originated in Pittsburgh, Pennsylvania. It was owned in the early 20th century by Edgar J. Kaufmann, patron of 'Fallingwater'. In the post-war years, the store became a regional chain in the eastern United States, and was last owned by Federated Department Stores. At the height of its existence, it had some 59 stores in 5 states. Formerly part of May Department Stores prior to that company's acquisition by Federated on August 30, 2005, Kaufmann's operated as part of the Filene's organization in Boston, Massachusetts. On February 1, 2006, the Filene's/Kaufmann's organization was dissolved and the management of its stores was assumed by Macy's East and the new Macy's Midwest. On September 9, 2006, Macy's retired the Kaufmann's name as Federated Department Stores converted the former May Company brands to its masthead. In 2015, Macy's closed and sold the iconic Pittsburgh store for redevelopment as part of the company's ongoing reorganization of its owned properties. Core Reality of Philadelphia, the new owners of the building, have named the proposed mixed-use property "Kaufmann's Grand on Fifth" in honor of the historic property.
Document 10: Blackpool Tower: Blackpool Tower is a tourist attraction in Blackpool, Lancashire, England, which was opened to the public on 14 May 1894. Inspired by the Eiffel Tower in Paris, it is 518 ft tall and is the 120th tallest freestanding tower in the world. Blackpool Tower is also the common name for Tower buildings, an entertainment complex in a red-brick three-storey block comprising the tower, the ground floor aquarium and cafeteria, Tower Circus, the Tower Ballroom and roof gardens that was designated a Grade I listed building in 1973.
Document 11: Empress Ballroom: The Empress Ballroom is a 3,000 capacity entertainment venue, in Blackpool, Lancashire, England. It is located within the Winter Gardens, a large entertainment complex in the town centre.
Document 12: Warner Bros. Studio Store: The Warner Bros. Studio Store was a chain of retail stores selling Looney Tunes and other merchandise based on Warner Bros. films, similar in style to The Disney Store. They first opened in 1991. In 1996, Warner Bros. owner Time Warner merged with Turner Broadcasting, which owned Hanna-Barbera and the pre-1986 MGM library, and merchandise based on Turner properties were added to the product lines. In 2001, all Warner Bros. Studio Stores went out of business. In 2006, Warner Bros. Consumer Products partnered with PMW Retail and reopened the stores in China.
Document 13: Great Mills (DIY): Great Mills was a large DIY chain, consisting of around 98 stores across the United Kingdom. In December 2000, the business was bought by Focus DIY, which in turn entered administration in May 2011, with all stores closing by July 2011. Most Focus DIY stores have been bought, some by B&Q, Wickes and B&M Bargains (B&M Homestore).
Document 14: Lewis's: Lewis's was a chain of British department stores that operated from 1856 to 2010. The parent companies of Lewis's have gone into administration many times over the years, including 1991. The first store, which opened in Liverpool city centre, became the flagship of the chain of stores operating under the Lewis's name. Several stores in the chain were bought in 1991 by the company Owen Owen and continued to operate under the Lewis's brand name for several years, but after the closure of the Manchester store in 2002, only the original Liverpool store continued to trade under the Lewis's name. This store was sold in 2007 to the Vergo Retail Ltd and closed in 2010.
Document 15: Home Retail Group: formerly publicly traded as Home Retail Group plc (), was a home and general merchandise retailer based in the United Kingdom. It was the parent company of Argos and Habitat, and also owned the DIY chain Homebase until it sold it to the Australian retailer Wesfarmers in February 2016. Home Retail Group was listed on the London Stock Exchange until it was acquired by the British supermarket company Sainsbury's for £1.4 billion on 2 September 2016.
ground_truth: Lewis's