As is always pointed out here wealth and income are two different things. Catholic dioceses are independent financial entities but even the nation-level parts of the Catholic church are fabulously wealthy with real-estate and art work and other assets of significant value.

The Catholic Church of Germany is worth an estimated $25,000,000,000. The Catholic Church of Australia is estimated to be worth around $20,000,000,000. Opus Dei which is a weird Catholic-supremacist group is worth $2,000,000,000 alone. The wealth of the Vatican is unknown and likely far far higher.

https://en.wikipedia.org/wiki/List_of_wealthiest_organizatio...