According to the Vatican, abandoned churches can be demolished

Vatican - Churches that are not visited by believers and that have no artistic or historical value can be sold or demolished, but they cannot be turned into nightclubs. This was stated today in the Vatican by the President of the Pontifical Council for Culture, Gianfranco Ravasi.
    "Churches struggling with a decline in the number of believers, which is a phenomenon we unfortunately encounter even in the center of Rome, churches without special artistic value and requiring too expensive a reconstruction can be sold or demolished," Ravasi told the press. He specified that the fate of abandoned places of worship is decided by the relevant bishops' conferences. "We have not issued any general guidelines; decisions should be made on a case-by-case basis," he added.
    Ravasi admitted that the reconstruction of some sanctuaries may be too costly for certain dioceses, but he called for the utmost caution when deciding the future of churches.
    As an example, the President of the Pontifical Council for Culture mentioned a church in Hungary that "has turned into a nightclub and a striptease took place on the altar."
    In the Czech Republic, deconsecrated churches most often become concert halls, galleries, or cultural and social centers. In worse cases, they serve as storage spaces or become ruins ripe for demolition. According to earlier statements by the conservator of the Prague Catholic Archdiocese, Vladimír Kelnar, a third of the churches in the country are in a state of disrepair. Buildings are also changing their original purpose in neighboring Germany. In Austria, churches are deconsecrated only exceptionally, while in Poland and Slovakia, new sanctuaries are being created.
    In the past, the case of the St. Michael's Church in the Old Town, where an investor disturbed ancient graves and where a controversial show was held, caused outrage.