A group of teenagers have been captured on CCTV vandalising the Town Church in St Peter Port.
Police are looking for three boys aged around 13-15 who set fire to paper and candles, and poured the hot wax over hand-stitched cushions.
Sticky liquid was poured across the floor of the church, which required professional cleaning.
Bailiwick Law Enforcement is giving the trio involved an opportunity to come forward, saying it does have them on CCTV.
Anyone with information, or who spotted youths on 9 August between 5:40pm and 5:50pm acting in an anti-social manner, are asked to contact 222 222, or Crimestoppers anonymously on 0800 555 111.

Prime Guernsey seafront location for sale
Woman (20) arrested on suspicion of attempted murder in Guernsey
Last day to register for Guernsey's upcoming by election
New citizen science project observing Guernsey dragonflies and damselflies
Channel Islands music school to hit global stage with Dubai launch
67,000 sickness days across the States of Guernsey last year
The Channel Islands are officially in meteorological drought
Islanders asked for views on body image and masculinity