Adalbert of Prague in the context of "Patron saints of Poland"

Bolesław I the Brave (c. 967 – 17 June 1025), less often known as Bolesław the Great, was Duke of Poland from 992 to 1025 and the first King of Poland in 1025. He was also Duke of Bohemia between 1003 and 1004 as Boleslaus IV. A member of the Piast dynasty, Bolesław was a capable monarch and a strong mediator in Central European affairs. He continued to proselytise Western Christianity among his subjects and raised Poland to the rank of a kingdom, thus becoming the first Polish ruler to hold the title of rex, Latin for king.

The son of Mieszko I of Poland by his first wife Dobrawa of Bohemia, Bolesław ruled Lesser Poland already during the final years of Mieszko's reign. When the country became divided in 992, he banished his father's widow, Oda of Haldensleben, purged his half-brothers along with their adherents and successfully reunified Poland by 995. As a devout Christian, Bolesław supported the missionary endeavours of Adalbert of Prague and Bruno of Querfurt. The martyrdom of Adalbert in 997 and Bolesław's successful attempt to ransom the bishop's remains, paying for their weight in gold, consolidated Poland's autonomy from the Holy Roman Empire.

The Metropolitan Cathedral of Saints Vitus, Wenceslaus and Adalbert (Czech: metropolitní katedrála svatého Víta, Václava a Vojtěcha) is a Catholic metropolitan cathedral in Prague, and the seat of the Archbishop of Prague. Until 1997, the cathedral was dedicated only to Saint Vitus, and is still commonly named only as St. Vitus Cathedral (Czech: katedrála svatého Víta or svatovítská katedrála).

This cathedral is a prominent example of Gothic architecture, and is the largest and most important church in the country. Located within Prague Castle and containing the tombs of many Bohemian kings and Holy Roman Emperors, the cathedral is under the ownership of the Czech government as part of the Prague Castle complex. The cathedral's dimensions are 124 m × 60 m (407 ft × 197 ft), the main tower is 102.8 m (337 ft) high, front towers 82 m (269 ft), arch height 33.2 m (109 ft).

Bogurodzica (Polish pronunciation: [bɔɡurɔˈd͡ʑit͡sa], calque of the Greek term Theotokos), in English known as the Mother of God, is a medieval Christian hymn composed sometime between the 10th and 13th centuries in Poland. It is believed to be the oldest religious hymn or patriotic anthem in the Polish language, which was traditionally sung in Old Polish with the Ancient Greek phrase Kyrie eleison lit. 'Lord, have mercy'. While its origin is not entirely clear, several scholars agree that Saint Adalbert of Prague is the likely author. Polish knights chanted Bogurodzica prior to their engagement at the Battle of Grunwald and it also accompanied the coronation ceremonies of the first Jagiellonian kings.

The Primatial Basilica of the Assumption of the Blessed Virgin Mary and St Adalbert (Hungarian: Nagyboldogasszony és Szent Adalbert prímási főszékesegyház), also known as the Basilica of Esztergom (Hungarian: Esztergomi bazilika), is an ecclesiastic basilica in Esztergom, Hungary, the mother church of the Archdiocese of Esztergom-Budapest, and the seat of the Catholic Church in Hungary. It is dedicated to the Assumption of Saint Mary and Saint Adalbert.

It is the largest church in Hungary. Its inner area is 5,600 m. It is 118 m long and 49 m wide. It has a reverberation time of more than 9 seconds. Its dome, forming a semi-sphere, is situated in the middle, and it has 12 windows. It is 71.5 m high inside (which makes it one of the tallest domes in the world), with a diameter of 33.5 metres, and is 100 m high from outside, the stairs count 400 steps counted from the crypt.