C. mid 10th Century | The first Piast grads appear in Wielkopolska in Grzybowo near Września (c. 920-930), Poznań (c. 930-940), Gniezno (c. 940) and Giecz (mid-10th C). |
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966 | The baptism of Mieszko I signals the beginning of Christianisation. |
9-10 Mar 1000 |
Holy Roman Emperor Otto III visits for the Congress of Gniezno. Pope Sylvester II formally creates an archbishopric in Gniezno and appoints Radim Gaudentius (Radzim-Gaudenty) archbishop in 999. |
18 Apr 1025 |
The first Polish ruler Bolesław Chrobry (Boleslaus the Brave) is crowned in Gniezno Cathedral. |
25 Dec 1025 |
Mieszko II is crowned in Gniezno Cathedral. |
1153 |
A Cistercian abbey is founded in Łękno (Wągrowiec County).
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1238 | Gniezno, the first city in Wielkopolska, is established. |