Complex sentence: In 1836, Onofre Cortès was designated councilor of the Palma townhall; it was the first time since the 16th century that a Xueta occupied public offices of a such a level; after this moment, Xueta presence in the townhall and the Diputación Provincial became habitual.
Split into simpler sentences: In 1836, Onofre Cortès was designated councilor of the Palma town hall; it was the first time since the 16th century that a Xueta occupied public offices of a such a level. From that time, Xueta presence in the townhall and the Diputación Provincial became habitual.