 
 <prompt> Wetin be di event wey cause Utrecht to gain importance and power? Based on di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: By di mid-7th century, English and Irish missionaries waka go convert di Frisians. Di pope appoint dia leader, Willibrordus, as bishop of di Frisians. Di time wey Willibrordus dey serve na di beginning of di Bishopric of Utrecht. For 723, di Frankish leader Charles Martel give di fortress for Utrecht and di land around am to di bishops. From dat time, Utrecht come be one of di most powerful seats of power for di Roman Catholic Church for Netherlands. Di archbishops of Utrecht dey based for di border of di Carolingian Empire wey dey cause wahala. Besides, di city of Utrecht get competition from di nearby trading centre Dorestad. After Dorestad fall around 850, Utrecht come be one of di most important cities for Netherlands. Di importance of Utrecht as centre of Christianity dey show as dem elect di Utrecht-born Adriaan Florenszoon Boeyens as pope for 1522 (di last non-Italian pope before John Paul II). 