Up to 70 chanting protesters encircled the entrances to Barnsley Town Hall on Wednesday of last week.
They demanded that the Labour council abandon its plans to demolish the central library and build a smaller, cheaper one.
Dave Gibson, the secretary of the campaign said, “Labour did not listen to us. We organised the biggest petition in Barnsley’s history. We have had three months of consistently well supported protests. Yet they are still going ahead with demolition.
“But we are not giving in—we are fighting to defend our library services for future generations.”
Campaigners plan to protest outside the full council meeting on Thursday of this week.