Extensive damage has been caused to the Theatre Royal in Workington after it was broken into.
The theatre was broken into and vandalised leaving a lot of damage around the bar and fridges.
Damage was also caused to technical equipment with some of it also stolen.
Part of the community in Workington since the 1860s, a police investigation has been ongoing to find out what happened.
In a statement on social media the Theatre Royal in Workington said: "Earlier this week our beloved theatre was broken into and terribly vandalised.
"I know this information will come as a shock to you. We have had to keep it under wraps while the police investigation was ongoing.
"There is a lot of damage as the fridges in the bar area were smashed and valuable technical equipment is broken or missing. The theatre is a heart of this community and this act is an appalling crime against all of us and we are deeply saddened.
"The theatre was already struggling and this crime will put us even further back so we are asking for your support. Without you there will be no Theatre Royal."
A Cumbria Police statement said: "Police were called at around 6:25pm on 29 November to a report that the Theatre Royal, Washington Street, Workington, had been broken into and items stolen from within.
"Police attended the scene.
"Four 16-year-old boys were arrested in connection with the damage and break in at the theatre. They have since been released on police bail."
Want a quick and expert briefing on the biggest news stories? Listen to our latest podcasts to find out What You Need To know...