He was also his ambassador in the matter of his wedding with Violant of Bar , in Paris .
He held several important positions in king John I of Aragon court : counselor , chamberlain and Chancellor of the Exchequer among others .
He was also John I 's ambassador in the matter of his wedding with Violant of Bar , in Paris .
He held several important positions in king John I of Aragon court : counselor , chamberlain and Chancellor of the Exchequer among others .