Two churches have had their ornate stained glass windows smashed in the past week by people throwing stones through them.
A Victorian stained glass window at the Grade I listed 14th century St Andrew’s Church, in Church Street, Billingborough, was broken between Friday and Sunday.
Last Monday church volunteers at the neighbouring Grade 1 listed 13th century St Andrew’s Church in High Street, Horbling, discovered about 12 damaged triangular panels of glass and three stained glass panels had been smashed by gravel from the churchyard being thrown through the window.
The window dates back to the 1930s and was dedicated by the Smith family from Horbling.
The damage to the two windows combined could cost about £1,500 to fix, some of which will not be covered by insurance.
The Reverend Anna Sorensen, who serves both of the vandalised churches, said: “It is so hurtful and thoughtless that someone would do this.
“This type of damage costs such a lot to mend, especially to stained glass.
“The church has to raise money for quite a lot of things without having to find money for this.”
Horbling churchwarden David Edwards said: “It is just mindless vandalism.
“It is rather disappointing that someone has done this. It is a very beautiful window.
“There is a feeling of disappointment and sadness that someone would do this type of thing.”
Both incidents have been reported to the police and signs have been put up in the churchyard warning people to be vigilant of anyone undertaking anti-social behaviour.
Churchwardens have also contacted the local schools to make them aware of the incidents.
Anyone with information should contact police on 101, quoting incident 251 of April 21. Alternatively contact independent charity Crimestoppers anonymously on 0800 555 111 or report it via the website www.crimestoppers-uk.org.