Title: Saint Peter
Content:  Traditionally, Roman authorities sentenced him to death by crucifixion at Vatican Hill. In accordance with the apocryphal Acts of Peter, he was crucified head down. Tradition also locates his burial place where the Basilica of Saint Peter was later built, directly beneath the Basilica's high altar.  Pope Clement I (d. 99), in his Letter to the Corinthians (Chapter 5), written c. 80–98, speaks of Peter's martyrdom in the following terms: "Let us take the noble examples of our own generation. Through jealousy and envy the greatest and most just pillars of the Church were persecuted, and came even unto death. …Peter, 
Title: Peter the Aleut
Content:  Peter the Aleut has been referred to as a "martyr of San Francisco". Additionally, many modern descriptions of the martyrdom of Peter the Aleut often describe the event as occurring "in San Francisco", and others describe the Native Alaskan traders as being brought "to San Francisco". Other sources can be found describing the event as occurring near Los Angeles or in Southern California. These varying descriptions of the location may be based on varying oral traditions, varying understandings of the relationship of the location of the martyrdom and Fort Ross, and also on varying interpretations of references to "San Pedro" in the original historical documents. The earliest historical sources about the death of Peter the Aleut describe the event as taking place 
Title: Peter of Krutitsy
Content:  the years 1931 to 1937 in solitary confinement in the Verkhneuralsk prison. In July 1936, his confinement was extended to three more years, while Metropolitan Sergius was given a false report of Peter's death and therefore assumed the full leadership of the Russian Orthodox Church. On October 2, 1937, the NKVD troika for Chelyabinsk Oblast sentenced Metropolitan Peter to death. He was executed by shooting at 4 p.m. on October 10, 1937, and buried in the city of Magnitogorsk, Chelyabinsk region. Metropolitan Peter of Krutitsy was canonized as Hieromartyr by the decision of Hierarchical Council of the Russian Orthodox Church on February 23, 1997. His feast day is celebrated on the anniversary of his death, October 10 (N.S.).
Title: St. Peter's Basilica
Content:  64 AD during the reign of the Roman Emperor Nero. His execution was one of the many martyrdoms of Christians following the Great Fire of Rome. According to Jerome, Peter was crucified head downwards, by his own request because he considered himself unworthy to die in the same manner as Jesus. The crucifixion took place near an ancient Egyptian obelisk in the Circus of Nero. The obelisk now stands in St. Peter's Square and is revered as a "witness" to Peter's death. It is one of several ancient Obelisks of Rome. According to tradition, Peter's remains were buried just outside the Circus, on the Mons Vaticanus across the Via Cornelia from the Circus, less than 150 m from his 
Title: Saint Peter
Content:  again"). Peter then gains the courage to continue his ministry and returns to the city, where he is martyred. This story is commemorated in an Annibale Carracci painting. The Church of Quo Vadis, near the Catacombs of Saint Callistus, contains a stone in which Jesus' footprints from this event are supposedly preserved, though this was apparently an ex-voto from a pilgrim, and indeed a copy of the original housed in the Basilica of St Sebastian. The death of Peter is attested to by Tertullian (c. 155 – c. 240) at the end of the 2nd century in his Prescription Against Heretics, 
Title: Saint Peter
Content:  as AD 44. The Muratorian fragment, dated to the second century AD, notes that the primary eyewitness to Acts, Luke, was not present at Peter's death. Early Church tradition says that Peter probably died by crucifixion (with arms outstretched) at the time of the Great Fire of Rome in the year 64. This took place three months after the disastrous fire that destroyed Rome for which the emperor (Nero) wished to blame the Christians. This "dies imperii" (regnal day anniversary) was an important one, exactly ten years after Nero ascended to the throne, and it was "as usual" accompanied by much 
Title: Saint Peter's tomb
Content:  The earliest reference to Saint Peter's death is in a letter of Clement, bishop of Rome, to the Corinthians (1 Clement, a.k.a. Letter to the Corinthians, written c. 96 AD). The historian Eusebius, a contemporary of Constantine, wrote that Peter "came to Rome, and was crucified with his head downwards," attributing this information to the much earlier theologian Origen, who died c. 254 AD. St. Peter's martyrdom is traditionally depicted in religious iconography as crucifixion with his head pointed downward. Peter's place and manner of death are also mentioned by Tertullian (c. 160-220) in Scorpiace, where the death is said to take place during the Christian persecutions by Nero. Tacitus (56–117) describes the persecution of Christians in his Annals, though he does not specifically mention Peter. "They were torn by dogs and perished, or were nailed to crosses, or were doomed to the flames and burnt." Furthermore, Tertullian says these events took place in the imperial gardens near the Circus of Nero. No other area would have been available for public persecutions after the Great Fire of Rome destroyed the Circus Maximus and most of the rest of the city in the year 64 AD.
Title: Peter the Great
Content:  only source for the story, and it seems unlikely that no one else would have documented such an act of heroism. This, plus the interval of time between these actions and Peter's death seems to preclude any direct link. In early January 1725, Peter was struck once again with uremia. Legend has it that before lapsing into unconsciousness Peter asked for a paper and pen and scrawled an unfinished note that read: "Leave all to ..." and then, exhausted by the effort, asked for his daughter Anna to be summoned. Peter died between four and five in the morning 8 February 1725. An autopsy revealed his bladder to be infected with gangrene. He was fifty-two years, seven months old when he died, having reigned forty-two years. He is interred in Saints Peter and Paul Cathedral, Saint Petersburg, Russia.
Title: Peter of Canterbury
Content:  Peter drowned while crossing the English Channel on the way to Gaul, at a place called Ambleteuse, near Boulogne. At first he was buried hastily nearby, but Bede reports that after a light illuminated the grave every night, the locals realised Peter was a saint and exhumed him and re-interred him in Boulogne. The actual date of death is unknown, and since his feast day was celebrated on two different days, 30 December or 6 January, that information does not clear up the mystery. The date of his death is reported to have been 1 year, 7 months and 3 weeks after Augustine's, by Thomas of Elmham, a 15th-century chronicler. If this is true, this would give a year 
Title: Peter the Aleut
Content:  According to Yanovsky's 1865 letter, upon receiving the report of Peter's death, St. Herman on Kodiak Island was moved to cry out, "Holy new-martyr Peter, pray to God for us!" Peter the Aleut was glorified as a saint by the Russian Orthodox Church Outside Russia and locally glorified by the Diocese of Alaska of the Orthodox Church in America as the "Martyr of San Francisco" in 1980. His feast day is celebrated on September 24 or December 12. A number of churches have been dedicated to him in North America, including churches at Lake Havasu City, Arizona, Minot, North Dakota, Calgary, and Abita Springs, Louisiana.

Question: where was st peter killed?
Answer: Rome.