Auckland Museum closed its doors yesterday and the police were called after a group of protesters tried to enter without wearing masks.
The group of about 50 protesters, led by parents of home school children, gathered at the Cenotaph in front of the museum in the morning and when security staff closed the front entrance the group moved to the rear entrance.
A museum spokeswoman said a decision was made to shut both doors about 11am to ensure the safety and security of staff and collections. Visitors inside the museum were able to stay but no new visitors were allowed in until the doors reopened at 1.20pm.
Police said they attended the protest and left after the group dispersed in the afternoon.
Under the red light setting, museum visitors aged 12 years and over must wear a mask.