Monarchs who established Catholicism in their kingdom could impose the religion how they wished.
Yes, monarchs who established Catholicism in their kingdom often had the power to impose the religion as they saw fit. In many instances, they could pass laws that made Catholicism the official state religion and enforced its teachings and practices on their subjects.
These monarchs could dictate religious policies, including the appointment of bishops and clergy, control over church properties and revenues, and the regulation of religious practices and rituals. They often had the authority to suppress other religious denominations and impose penalties on dissenters.
Monarchs in Catholic kingdoms could also enforce religious conformity through various means, such as the Inquisition, which was a tool used to identify and eradicate heresy or dissent within the kingdom. This often involved persecuting individuals who held opposing religious beliefs or practices.
Additionally, monarchs could use their authority to promote Catholicism through patronage of religious art, architecture, and education. This helped to solidify Catholic influence and create a conformist society that aligned with the religious ideals of the monarchy.
However, it's important to note that the extent to which monarchs could impose Catholicism varied across different time periods and regions. Certain kingdoms allowed for greater religious tolerance or experienced periods of religious pluralism, depending on the policies of the ruling monarch and broader political and social factors at play.