Why buy back what is properly yours to begin with? They will wait until the thieves become contrite, confess their sins, and return the property.
The cathedral was built by the people for their own use. When the RC church wasn’t holding services, another provider was found.
There is a wondeful old church building in Cashel Ireland. It was sold to a restauranteur in 1968. Chez Hans gets great reviews. I have eaten there several times and it is very good indeed.
http://chezhans.net/