Thirty-six panes of glass have been broken during an attack on an Orange hall at Beragh in County Tyrone.
The door and the interior of Kirkpatrick Memorial Hall on the Donaghanie Road were also damaged during the incident.
Police said the premises were broken into some time between Friday night and Saturday morning.
They are treating the incident as a hate crime.
A spokesman for Grand Lodge said the attack was "carefully planned".
He added: "Anyone who saw people acting suspiciously around the hall should let the police know as soon as possible.
The way to deal with these attacks is by helping the police catch the culprits and then it is up to the courts to deal properly the offenders.
"An attack on an Orange Hall is a blatant attack on our culture and must be taken seriously by everyone in the community and by the relevant authorities."