only the southeastern was built, as De Beauvoir Square, although the diagonals partly survived in Enfield Road, Stamford Road and Ardleigh Road. Occupied in the 1840s by the newly emerging middle classes, the estate was almost wholly residential except around Kingsland Basin and the south-west corner where a factory was leased from 1823. 20th century In 1907, the Fifth Congress of the Russian Social Democratic Labour Party was held at the Brotherhood Church on the east side of Southgate Road. Attendees included Lenin, Stalin, Maxim Gorky, Rosa Luxemburg and Leon Trotsky. The congress debated strategy for a communist revolution in Russia and strengthened the position of Lenin's Bolsheviks. In 1937, due to its easy access to Kingsland Basin, the southeast corner between Downham Road and Hertford Road was re-zoned for industrial use. Soon afterwards, the areas south of Downham Road were included. These were distinguished from the north side, which was already zoned for business and acted as a buffer for the mainly residential streets beyond. In 1938 De Beauvoir Crescent was suggested as another business zone to protect housing to the north. In the early 1960s the northern part of De Beauvoir Town between Buckingham Road and Tottenham Road was rebuilt as the Metropolitan Borough of Hackney's Kingsgate estate. In the late 1960s a larger area west of the canal basin, which contained many small factories, made way for the De Beauvoir Estate. The east side of De Beauvoir Square was also rebuilt as the Lockner Road estate. In 1968 the De Beauvoir Association was formed to fight Hackney Council's plans to demolish the area and build new build council estates on it. The rest of the square with the area bounded by Englefield Road, Northchurch Road, Southgate Road, Hertford Road, and Stamford Road became a conservation area in 1969. This area was later extended to cover most of De Beauvoir Town; the eastern edge, however, is in the Kingsland conservation area. In the 1970s the Greater London Council installed experimental design measures in De Beauvoir Town to reduce through vehicle traffic and make streets safer for children's play. These were designed by the architect Graham Parsey who lived in the area and was chairman of the De Beauvoir Association. This included filtered permeability measures on roads including Downham Road and Northchurch Road. In the arts The music video to accompany the release of "Stay With Me" by Sam