Revive-name itself says what it means. Reviving any transcendental being could be done in any place as long as the person who reviving the others must be above the Early Emperor Rank cultivator....but a priest or pope or anyone who works under the temple, above Late Domain Rank could able to revive and it was due to the gods blessing their followers...its actually a good job that anyone could be a priest but you have to surrender yourself to the god.
Most people chose Temples and Churches as their Revive chambers because there was a common belief that by reviving in the Temple or Church, there was a chance that they may be blessed by the gods and also you can't easily find an Early Emperor Rank cultivator.
