Question: What date did the Governor of the city where the basilica that is named after the same person as the Bremen Cathedral and the head of the catholic religion is located end?

Knowledge 1: Bremen Cathedral
Bremen Cathedral (), dedicated to St. Peter, is a church situated in the market square in the center of Bremen, in northern Germany. The cathedral belongs to the Bremian Evangelical Church, a member of the Protestant umbrella organization named Evangelical Church in Germany. It is the previous cathedral of the former Prince-Archbishopric of Bremen. Since 1973, it is protected by the monument protection act. [SEP] Knowledge 2: St. Peter's Basilica
The Papal Basilica of St. Peter in the Vatican (Italian: Basilica Papale di San Pietro in Vaticano), or simply St. Peter's Basilica (Latin: Basilica Sancti Petri), is an Italian Renaissance church in Vatican City, the papal enclave within the city of Rome. [SEP] Knowledge 3: Governor of Vatican City
The post of Governor of Vatican City (Governatore dello Stato della Città del Vaticano in Italian) was held by Marchese Camillo Serafini from the foundation of the state in 1929 until his death in 1952. No successor was appointed, and the post itself was not mentioned in the Fundamental Law of Vatican City State issued by Pope John Paul II on 26 November 2000, which entered into force on 22 February 2001.
Knowledge 1: Bremen Cathedral
Bremen Cathedral (), dedicated to St. Peter, is a church situated in the market square in the center of Bremen, in northern Germany. The cathedral belongs to the Bremian Evangelical Church, a member of the Protestant umbrella organization named Evangelical Church in Germany. It is the previous cathedral of the former Prince-Archbishopric of Bremen. Since 1973, it is protected by the monument protection act. [SEP] Knowledge 2: Old St. Peter's Basilica
St. Peter's Basilica Basilica Sancti Petri 19th - century drawing of St. Peter's Basilica as it is thought to have looked around 1450. The Vatican Obelisk is on the left, still standing on the spot where it was erected on the orders of the Emperor Caligula in 37 A.D. Basic information Geographic coordinates 41 ° 54 ′ 8 ''N 12 ° 27 ′ 12'' E ﻿ / ﻿ 41.90222 ° N 12.45333 ° E ﻿ / 41.90222; 12.45333 Coordinates: 41 ° 54 ′ 8 ''N 12 ° 27 ′ 12'' E ﻿ / ﻿ 41.90222 ° N 12.45333 ° E ﻿ / 41.90222; 12.45333 Affiliation Roman Catholic Country Papal States Year consecrated c. 360 Ecclesiastical or organizational status Major basilica Architectural description Architectural style Ancient Roman architecture Groundbreaking 326 - 333 (326 - 333) Completed c. 360 (c. 360) [SEP] Knowledge 3: St. Peter's Basilica
Old St. Peter's Basilica was the 4th - century church begun by the Emperor Constantine the Great between 319 and 333 AD. It was of typical basilical form, a wide nave and two aisles on each side and an apsidal end, with the addition of a transept or bema, giving the building the shape of a tau cross. It was over 103.6 metres (340 ft) long, and the entrance was preceded by a large colonnaded atrium. This church had been built over the small shrine believed to mark the burial place of St. Peter. It contained a very large number of burials and memorials, including those of most of the popes from St. Peter to the 15th century. Like all of the earliest churches in Rome, both this church and its successor had the entrance to the east and the apse at the west end of the building. Since the construction of the current basilica, the name Old St. Peter's Basilica has been used for its predecessor to distinguish the two buildings.
Knowledge 1: Bremen Cathedral
Bremen Cathedral (), dedicated to St. Peter, is a church situated in the market square in the center of Bremen, in northern Germany. The cathedral belongs to the Bremian Evangelical Church, a member of the Protestant umbrella organization named Evangelical Church in Germany. It is the previous cathedral of the former Prince-Archbishopric of Bremen. Since 1973, it is protected by the monument protection act. [SEP] Knowledge 2: Old St. Peter's Basilica
St. Peter's Basilica Basilica Sancti Petri 19th - century drawing of St. Peter's Basilica as it is thought to have looked around 1450. The Vatican Obelisk is on the left, still standing on the spot where it was erected on the orders of the Emperor Caligula in 37 A.D. Basic information Geographic coordinates 41 ° 54 ′ 8 ''N 12 ° 27 ′ 12'' E ﻿ / ﻿ 41.90222 ° N 12.45333 ° E ﻿ / 41.90222; 12.45333 Coordinates: 41 ° 54 ′ 8 ''N 12 ° 27 ′ 12'' E ﻿ / ﻿ 41.90222 ° N 12.45333 ° E ﻿ / 41.90222; 12.45333 Affiliation Roman Catholic Country Papal States Year consecrated c. 360 Ecclesiastical or organizational status Major basilica Architectural description Architectural style Ancient Roman architecture Groundbreaking 326 - 333 (326 - 333) Completed c. 360 (c. 360) [SEP] Knowledge 3: Governor of Vatican City
The post of Governor of Vatican City (Governatore dello Stato della Città del Vaticano in Italian) was held by Marchese Camillo Serafini from the foundation of the state in 1929 until his death in 1952. No successor was appointed, and the post itself was not mentioned in the Fundamental Law of Vatican City State issued by Pope John Paul II on 26 November 2000, which entered into force on 22 February 2001.

Answer: 1952