"We are a small school trying our best to survive in financial times that are difficult for many.
"Please, anyone who knows anything about who did this, some time between Monday afternoon and Tuesday morning, come forward. This needs to stop."
Principal Michele Mill, who is currently overseas, was equally saddened and angered, the only potential consolation being that the vandals may have been captured on the security cameras.
"Whatever is on the cameras, I hope we will glean some information from someone," she said.
"These vandals have no respect at all for anyone. A while ago the brass plaque was stolen off a memorial to the Sisters of Mercy, Sister Bernadette being one of them."