Designed by the Swedish architect Johan Erik Stenberg, the Neo-Renaissance Pori Theatre was built in 1884. The building underwent renovation between 2015 and 2017, in which all of the theatre’s technical systems were updated. In terms of structural engineering, the design of the support structures for the technical systems and the integration of systems presented the main challenges. The most demanding design project involved the steel trusses that were installed on the main stage’s tower, next to the old wooden trusses. All of the stage’s technical systems are supported by the new trusses. The original, wooden trusses, which are under heritage protection, now only support the roofing. The theatre’s additional building, which houses the smaller stage and auxiliary facilities, was completed in 1974.