Ten Christian protestors, including members of the clergy, held a protest at Wells Cathedral, urging Bath and Wells and 14 other Church of England dioceses to commit to divest from fossil fuels and invest in clean energy instead.
The Christian Climate Action members - a branch of Extinction Rebellion - took part in a Eucharist service before making their way to the altar during the final hymn, baring banners.
One protestor even went to the pulpit to explain their actions.
The activists are demanding that the Church immediately announces its intention to divest from fossil fuel companies and that they complete divestment by end October 2022 ahead of COP27 in Sharm El-Sheikh, Eygpt.
Dave Mitchell, local coordinator for Bristol, was at the protest. He said: "It never really hit me until about two years ago, that actually we are responsible for this world.
"The systems of the world, the kind of fossil fuel industry, and the general kind of geopolitical world that we live in, is responsible for huge amounts of damage.
"Lay that next to the fact that God created the world as a beautiful place where people and animals and all the natural world could coexist and live in beautiful harmony.
"And what are we doing to the world, we human beings, particularly in the affluent West - the rich, fossil fuel burning countries - we are trashing the place, we're destroying it bit by bit.”
The Diocese of Bath and Wells responded to claims about their fossil fuel investments, saying: "The Diocese of Bath and Wells is committed to ensuring that creation care is central to all our worship, thinking, actions and policies and, in 2020, declared a climate emergency and committed to reach net zero carbon emissions by 2030.
"The diocese has a creation-centric approach to investment and invests in line with guidance laid down by the Church of England's Ethical Investment Advisory Group, which means divesting from fossil fuel companies not aligned with the Paris Agreement by 2023.
"It currently holds no shares in oil or gas companies."