The concept of constitution originated with magna carta in british monarchy way back in 1215 A .D. magna carta liberatum is a charter agreed to by king john of england. It promised the protection of church rights, protection for the barons from illegal imprisonment, access to swift justice and limitation on feudal payments to crown to be implemented through a council of 25 barons.
To escape persecution and set up a new church that was completely different from Catholic Christian which they deemed Anglican to bee to similar to.
True they were but their family probably wasn’t