established

established /ɪˈstæblɪʃt/ adjective
established
/ɪˈstæblɪʃt/
adjective
Britannica Dictionary definition of ESTABLISHED
1 
: accepted and used by many people
2 
: successful for a long period of time
3 
of a church or religion : officially recognized and accepted by the government of a country — often used in British English to refer to the Church of England