In ecclesiastical heraldry, the Papal coat of arms contains a picture of the metaphorical keys of the office of St. Peter. The Keys of Heaven were, according to Christian tradition, received by Saint Peter from Jesus, marking Peter's ability to take binding actions. Thus, the Keys are seen as a symbol of Papal authority still to this day. "Behold he [Peter] received the keys of the kingdom of heaven, the power of binding and loosing is committed to him, the care of the whole Church and its government is given to him [cura ei totius Ecclesiae et principatus committitur (Epist., lib. V, ep. xx, in P.L., LXXVII, 745)]".

St Peter is often depicted in Roman Catholic and Eastern Orthodox pictures and artwork holding a key or set of keys. It is also notable that the general layout of St. Peter's Basilica is roughly key-shaped; evocative of the "keys" entrusted to St. Peter.

Bible verses associated with Peter, the first Pope, and his position of power: Is. 22:20-23; Matt. 10:2; Matt. 16:18-19; Luke 22:32; John 21:17; Acts 2:14; Acts 10:46; Gal. 1:18.

Key may refer to:

Ernest Pike (1871 – March 4, 1936) was an English tenor of the early 20th century who performed and recorded under his own name and under pseudonyms, including as Arthur Brett, Eric Courtland, Arthur Gray, Bernard Moss, Dick Denton, Charles Nelson, Allan Dale, Richard Pembroke and, most commonly, Herbert Payne. His recording repertoire was varied and included Gilbert and Sullivan operas, ballads and popular songs of the Edwardian era and First World War.

He was born in Pimlico, London, England in 1871 the son of Richard Pike, a builder. His first mention as a professional performer was under the stage name Herbert Payne, on tour with the D'Oyly Carte Opera Company's “B” Company in 1887 at the age of 16. He played one of the ghosts of the ancestors in Gilbert and Sullivan's Ruddigore. He went on to study at the Guildhall School of Music in London. He married May Stevens in 1900, and their daughter Maud was born in 1901.

His profession in 1900 was listed as being that of a commercial clerk, but it is not known for which organisation he was working in this capacity; however it is known that he recorded for HMV for 26 years with his final recordings dating from the mid-1920s. By the 1911 census, his profession was given as that of a professional singer, and he was living in Balham, South London. He also held posts at two London churches,Holy Trinity Sloane Street and The Spanish Church in Spanish Place, but the exact dates and durations of these posts are not known. During the Edwardian era he toured the country singing in many leading cities and towns, including concerts at the Queen's Hall and Royal Albert Hall in London. In January 1905 he performed for King Edward VII at Chatsworth House in Derbyshire for three nights in succession when the King was in residence for a visit to the Devonshire Hospital in Buxton. The 1917 Zonophone record catalogue described him as being the "The late King Edward's favourite tenor".

Saint Peter or Simon Peter was an early Christian leader and one of the twelve apostles of Jesus who is featured prominently in the New Testament Gospels and the Acts of the Apostles and who is venerated as a saint. The son of John or of Jonah, he was from the village of Bethsaida in the province of Galilee or Gaulanitis. His brother Andrew was also an apostle. Peter is venerated in multiple churches and is regarded as the first Pope by the Catholic Church. After working to establish the church of Antioch, presiding for seven years as the leader of the city's Christian community, he preached to scattered communities of believers, Jews, Hebrew Christians and the gentiles, in Pontus, Galatia, Cappadocia, Asia Minor and Bithynia.^{[citation needed]} He then went to Rome, where in the second year of Claudius, it is claimed, he overthrew Simon Magus and held the Sacerdotal Chair for 25 years.^{[citation needed]} He is said to have been put to death at the hand of Emperor Nero.

Peter wrote two General epistles. The Gospel of Mark is also ascribed to him (as Mark was his disciple and interpreter). On the other hand, several books bearing his name—the Acts of Peter, Gospel of Peter, Preaching of Peter, Revelation of Peter, and Judgement of Peter—are rejected by the Catholic Church as Apocryphal.

Yvette Guilbert (20 January 1865 in Paris – 3 February 1944 in Aix-en-Provence) was a French cabaret singer and actress of the Belle Époque.

Born into a poor family as Emma Laure Esther Guilbert, Guilbert began singing as a child but at age sixteen worked as a model at the Printemps department store in Paris. She was discovered by a journalist. She took voice and acting lessons on the side that by 1886 led to appearances on stage at smaller venues. Guilbert debuted at the Variette Theatre in 1888. She eventually sang at the popular Eldorado club, then at the Jardin de Paris before headlining in Montmartre at the Moulin Rouge in 1890. The English painter William Rothenstein described this performance in his first volume of memoirs:

"One evening Lautrec came up to the rue Ravignan to tell us about a new singer, a friend of Xanrof, who was to appear at the Moulin Rouge for the first time... We went; a young girl appeared, of virginal aspect, slender, pale, without rouge. Her songs were not virginal – on the contrary; but the frequenters of the Moulin were not easily frightened; they stared bewildered at this novel association of innocence with Xanrof's horrific double entente; stared, stayed and broke into delighted applause."