Complex sentence: During his reign Peter bestowed "fueros" on Barbastro (1100), Caparroso (1102), and Santacara (1102), the latter repopulated partly by Frenchmen, whose influence on their customs is apparent.
Split into simpler sentences: During his reign Peter bestowed "fueros" on Barbastro (1100), Caparroso (1102), and Santacara (1102). The last was repopulated partly by Frenchmen, whose influence on local customs is apparent.