Question: When did the place where the head of the catholic region named after the same saint as the Dakovo Cathedral become its own country?

Context paragraphs:
paragraph_text: 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.
title: St. Peter's Basilica
paragraph_text: The Đakovo Cathedral or Cathedral basilica of St. Peter () is the cathedral of the Roman Catholic Archdiocese of Đakovo-Osijek in Đakovo, Croatia.
title: Đakovo Cathedral
paragraph_text: Archdiocese of Washington Archidioecesis Vashingtonensis Location Country United States Territory District of Columbia plus counties of Montgomery, Prince George's, St. Mary's, Calvert, and Charles in Maryland Ecclesiastical province Washington Statistics Area 2,104 sq mi (5,450 km) Population - Total - Catholics (as of 2014) 2,867,377 630,823 (22.0%) Parishes 139 Information Denomination Roman Catholic Rite Roman Rite Established November 15, 1947 (70 years ago) Cathedral Cathedral of St. Matthew the Apostle Patron saint St. Matthew Current leadership Pope Francis Metropolital Archbishop Cardinal Donald Wuerl Auxiliary Bishops Mario E. Dorsonville Roy Edward Campbell Emeritus Bishops Theodore Edgar Cardinal McCarrick Francisco González Valer Website www.adw.org
title: Roman Catholic Archdiocese of Washington
paragraph_text: Holy Name Cathedral is a Catholic cathedral in Steubenville, Ohio, United States. It is the seat of the Diocese of Steubenville.
title: Holy Name Cathedral (Steubenville, Ohio)
paragraph_text: Alatri Cathedral, otherwise the Basilica of Saint Paul (; "Basilica concattedrale di San Paolo apostolo"), is a Roman Catholic cathedral in Alatri, Lazio, Italy, dedicated to Saint Paul. It was formerly the cathedral of the Diocese of Alatri. Since 30 September 1986 it has been a co-cathedral of the Diocese of Anagni-Alatri. Pope Pius XII declared it a basilica minor on 10 September 1950.
title: Alatri Cathedral
paragraph_text: Évry Cathedral (; "Évry Cathedral of the Resurrection") is a Roman Catholic church located in the new town of Évry (Essonne), France. The cathedral was designed by Swiss architect Mario Botta. It opened in 1995, and was consecrated and dedicated to Saint Corbinian in 1996.
title: Évry Cathedral
paragraph_text: The Basilica Cathedral of Lima, otherwise Lima Cathedral, is a Roman Catholic cathedral located in the Plaza Mayor of downtown Lima, Peru.  Construction began in 1535, and the building has undergone many reconstructions and transformations since. It retains its colonial structure and facade. It is dedicated to St John, Apostle and Evangelist.
title: Cathedral Basilica of Lima
paragraph_text: Getafe Cathedral (Spanish: Catedral de La Magdalena) is a Roman Catholic church located in Getafe, Spain. The edifice was a church for most of its existence, before becoming a cathedral in 1991 with the establishment of the Diocese of Getafe.
title: Getafe Cathedral
paragraph_text: The Cathedral of Saint Mary of the Immaculate Conception is the cathedral of the Roman Catholic Diocese of Lafayette in Indiana. It is located at 1207 Columbia Street in Lafayette, Indiana. It is also a contributing property in the St. Mary Historic District.
title: Cathedral of Saint Mary of the Immaculate Conception (Lafayette, Indiana)
paragraph_text: The Metropolitan Cathedral Church of the Holy Cross, Our Lady of Regla, and St Francis of Assisi is the main ecclesiastical building of the Catholic Church in Chihuahua, Chihuahua, Mexico. It is considered perhaps the finest example of colonial architecture in northern Mexico and dates from 1725. The cathedral is also the seat of the Roman Catholic Archdiocese of Chihuahua. the archbishop was Constancio Miranda Weckmann.
title: Cathedral of Chihuahua
paragraph_text: The abbey was restored to the Benedictines under the Catholic Mary I of England, but they were again ejected under Elizabeth I in 1559. In 1560, Elizabeth re-established Westminster as a "Royal Peculiar" – a church of the Church of England responsible directly to the Sovereign, rather than to a diocesan bishop – and made it the Collegiate Church of St Peter (that is, a non-cathedral church with an attached chapter of canons, headed by a dean.) The last of Mary's abbots was made the first dean.
title: Westminster Abbey
paragraph_text: On 9 July 2006, during Mass at Valencia's Cathedral, Our Lady of the Forsaken Basilica, Pope Benedict XVI used, at the World Day of Families, the Santo Caliz, a 1st-century Middle-Eastern artifact that some Catholics believe is the Holy Grail. It was supposedly brought to that church by Emperor Valerian in the 3rd century, after having been brought by St. Peter to Rome from Jerusalem. The Santo Caliz (Holy Chalice) is a simple, small stone cup. Its base was added in Medieval Times and consists of fine gold, alabaster and gem stones.
title: Valencia
paragraph_text: The name Vatican city was first used in the Lateran Treaty, signed on 11 February 1929, which established the modern city - state. The name is taken from Vatican Hill, the geographic location of the state. ``Vatican ''is derived from the name of an Etruscan settlement, Vatica or Vaticum meaning garden, located in the general area the Romans called vaticanus ager,`` Vatican territory''.
title: Vatican City
paragraph_text: Erfurt Cathedral (, officially "Hohe Domkirche St. Marien zu Erfurt", English: Cathedral Church of St Mary at Erfurt), also known as St Mary's Cathedral, is the largest and oldest church building in the Thuringian city of Erfurt, central Germany. It is the episcopal seat of the Roman Catholic Diocese of Erfurt. The cathedral was mainly built in the International Gothic style and is located on a hillside overlooking the main town square (, Cathedral Square). Former German names include and .
title: Erfurt Cathedral
paragraph_text: Later fresco replaced the more labor-intensive technique of mosaic in Western-Europe, although mosaics were sometimes used as decoration on medieval cathedrals. The Royal Basilica of the Hungarian kings in Székesfehérvár (Alba Regia) had a mosaic decoration in the apse. It was probably a work of Venetian or Ravennese craftsmen, executed in the first decades of the 11th century. The mosaic was almost totally destroyed together with the basilica in the 17th century. The Golden Gate of the St. Vitus Cathedral in Prague got its name from the golden 14th-century mosaic of the Last Judgement above the portal. It was executed by Venetian craftsmen.
title: Mosaic
paragraph_text: Sant'Eustachio is a Roman Catholic titular church and minor basilica in Rome, named for the martyr Saint Eustace. It is located on Via di Sant'Eustachio in the rione Sant'Eustachio, a block west of the Pantheon and via della Rotonda, and a block east of Sant'Ivo alla Sapienza and the Via della Dogana Vecchia.
title: Sant'Eustachio
paragraph_text: Cork features architecturally notable buildings originating from the Medieval to Modern periods. The only notable remnant of the Medieval era is the Red Abbey. There are two cathedrals in the city; St. Mary's Cathedral and Saint Fin Barre's Cathedral. St Mary's Cathedral, often referred to as the North Cathedral, is the Catholic cathedral of the city and was begun in 1808. Its distinctive tower was added in the 1860s. St Fin Barre's Cathedral serves the Protestant faith and is possibly the more famous of the two. It is built on the foundations of an earlier cathedral. Work began in 1862 and ended in 1879 under the direction of architect William Burges.
title: Cork (city)
paragraph_text: Foligno Cathedral () is a Roman Catholic cathedral situated on the Piazza della Repubblica in the center of Foligno, Italy. The cathedral, built on the site of an earlier basilica, is dedicated to the patron saint of the city, the martyr Felician of Foligno (San Feliciano), who was buried here in 251 AD. It is the seat of the Bishop of Foligno.
title: Foligno Cathedral
paragraph_text: The Cathedral Basilica of Saint Cecilia (French: "Basilique Cathédrale Sainte-Cécile d'Albi"), also known as Albi Cathedral, is the most important Catholic building in Albi, France and is the seat of the Catholic Archbishop of Albi. First built as a fortress in the aftermath of the Albigensian Crusade; begun in 1282 and under construction for 200 years, it is claimed to be the largest brick building in the world.
title: Albi Cathedral
paragraph_text: Innsbruck Cathedral, also known as the Cathedral of St. James (), is an eighteenth-century Baroque cathedral of the Roman Catholic Diocese of Innsbruck in the city of Innsbruck, Austria, dedicated to the apostle Saint James, son of Zebedee. Based on designs by the architect Johann Jakob Herkomer, the cathedral was built between 1717 and 1724 on the site of a twelfth-century Romanesque church. The interior is enclosed by three domed vaults spanning the nave, and a dome with lantern above the chancel. With its lavish Baroque interior, executed in part by the Asam brothers, St. James is considered among the most important Baroque buildings in the Tyrol.
title: Innsbruck Cathedral

Reasoning steps:
What is Đakovo Cathedral named after? >>>> Peter
st. Peter ’s basilica the head of the catholic religion is located in >>>> Vatican City
when did Vatican City become its own country >>>> 11 February 1929

Answer: spans: 11 February 1929