denominational
adj.relating to a specific religious group or church. You use this to describe things like schools, buildings, or organizations that belong to one particular church.
adj.relating to or characteristic of a specific religious denomination or church. Often used to describe educational institutions, charitable organizations, or social groups that are affiliated with a particular faith.
“The school is a private denominational institution.”
“The city is home to several denominational hospitals, each run by a different religious group.”
“While the university maintains a secular reputation, its denominational roots are still evident in the architecture of its original chapel and the traditions of its founding faculty.”
From denomination + -al.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.