Question: What Anglican cathedral that sits on Ludgate Hill in London was Charles Macpherson DMus an organist at?
Context: Seoul Anglican Cathedral English Mission is an Anglican church in Korea.  Anglican worship in English has been held on the site of the present Seoul Anglican Cathedral since its predecessor the Church of the Advent held its first Holy Communion service on 21 December 1890.  Even after the first missionaries had learned enough Korean and translated the liturgy according to the Book of Common Prayer into Korean, worship services in English continued for members of the foreign community in Seoul who desired Anglican or Episcopal Church services in that language.  It is probable that the only time services in English have been discontinued at Seoul Cathedral were during the Second World War, when Korea was under Japanese occupation, and during those periods of the Korean War when Seoul was captured by North Korean forces. Ludgate Circus is a road junction in the City of London where Farringdon Street and New Bridge Street (together forming part of the A201 road) cross Fleet Street and Ludgate Hill (which rises up to St Paul's Cathedral). St Paul's Anglican Cathedral Hall is a heritage-listed church hall at 89 William Street, Rockhampton, Rockhampton Region, Queensland, Australia.  It is adjacent to St Paul's Anglican Cathedral.  It was designed by Louis Spier Robertson and built  1900 .  It is also known as St Paul's Anglican Cathedral Offices, St Paul's Anglican Cathedral Parish Hall, and St Paul's Day School (1902-1912).  It was added to the Queensland Heritage Register on 23 June 2000. Charles Macpherson DMus (Dunelm) FRAM FRCO (1870–1927) was a Scottish organist, who served at St Paul's Cathedral.  He was born in Edinburgh on 10 May 1870.  His father was Burgh Architect.  At the age of nine he became a chorister at St. Paul's Cathedral, later studying music at the Royal Academy of Music.  He was organist at St Clement Eastcheap between 1887 and 1890, before returning to St Paul's as assistant organist between 1895 and 1916, being made organist in 1916, a position he held until his death.  He married Sophia Menella Newbolt, the youngest daughter of Canon Newbolt in 1910. The St. Barnabas' Anglican Cathedral, Honiara is one of three Anglican cathedrals built in the Solomon Islands.  The St. Luke's Cathedral was the first to be built in 1920s at Siota, Nggela but it was destroyed in World War II.  The second was the All Saints Cathedral, a temporary structure built in the 1950s which was replaced by the St. Barnabas' Anglican Cathedral, Honiara, named after the St. Barnabas' Chapel and School on Norfolk Island, in the 1960s; the planning to build it started in 1961.  The foundation stone for the new cathedral was laid on 6 January 1968 by Bishop Alfred Hill.  A dedication service was held on 15 December 1968 which was attended by 1500 people.  The cathedral was formally consecrated on 16 June 1969 when 2000 people attended the ceremony and it was dedicated by Bishops Chisholm and Alufurai. Ludgate was the westernmost gate in London Wall.  The name survives in Ludgate Hill, an eastward continuation of Fleet Street, Ludgate Circus and Ludgate Square. St Martin, Ludgate, is an Anglican church on Ludgate Hill in the ward of Farringdon, in the City of London.  St Martin, Ludgate, also called St Martin within Ludgate, was rebuilt in 1677–84 by Sir Christopher Wren. Ludgate Hill was a railway station in the City of London that was opened on 1 June 1865 by the London, Chatham and Dover Railway (LC&DR) as its City terminus.  It was situated on Ludgate Viaduct (a railway viaduct) between Queen Victoria Street and Ludgate Hill, slightly north of St. Paul's station (now called Blackfriars station) on the site of the former Fleet Prison. Ludgate Hill is a hill in the City of London, near the old Ludgate, a gate to the City that was taken down, with its attached gaol, in 1780.  It is the site of St. Paul's Cathedral, traditionally said to have been the site of a Roman temple of the goddess Diana.  It is one of the three ancient hills of London, the others being Tower Hill and Cornhill.  The highest point is just north of St. Paul's, at 17.6 m above sea level. St Paul's Cathedral, London, is an Anglican cathedral, the seat of the Bishop of London and the mother church of the Diocese of London.  It sits on Ludgate Hill at the highest point of the City of London and is a Grade 1 listed building.  Its dedication to Paul the Apostle dates back to the original church on this site, founded in AD 604.  The present cathedral, dating from the late 17th century, was designed in the English Baroque style by Sir Christopher Wren.  Its construction, completed in Wren's lifetime, was part of a major rebuilding programme in the City after the Great Fire of London.
Answer: St Paul's Cathedral