Seattle's historic venue Town Hall will open a few months later than expected, after contractors working on the building's $25 million renovation discovered last-minute complications.

The Seattle Times reports that the First Hill event space, a city landmark built more than a century ago as a Christian Science church, has been closed since construction began in summer 2017. The venue was set to reopen in March, but contractors have had difficulty aligning and applying plaster in the building's Great Hall and second floor.

A complication this close to a planned completion date is unusual, Town Hall executive director Wier Harman said in a statement. The project's general contractor, Rafn, is anticipating a 60-day delay.

Town Hall staff hope to reoccupy the building in May.