They used to criticise the Catholic Church for doing that.. :-
WT 99 3/15 p 24 “ Building on Pagan Foundations “
“The Pantheon was originally a pagan temple, a “place for all gods,” which is the meaning of the original Greek word. Today, it is still considered a Roman Catholic church. How was such a surprising transformation possible?"…………………….
It ought to be obvious, however, that changing the dedication of a temple or the name of a celebration is not sufficient to transform the ‘worship of devils into the service of the true God.’ “What agreement does God’s temple have with idols?” asked the apostle Paul. “‘Get out from among them, and separate yourselves,’ says Jehovah, ‘and quit touching the unclean thing’; ‘and I will take you in.’ ‘And I shall be a father to you, and you will be sons and daughters to me,’ says Jehovah the Almighty.”
……
Hypocrites !