The Turku Main Library 2,900 m2 old building is a Dutch late Renaissance style building, constructed in 1903, built and delivered by Turku commercial counsellor Fredric von Rettig and designed by Karl August Wrede.

The old building was renovated by architectural firm Arkkitehtitoimisto C&Co Oy, and the new section and overall plan by JKMM Architects.

The sculpture Visual Vortex - Passage of Events by Hans-Christian Berg is situated in the showcase by the main entrance.

Finally, Merja Pitkänen has realised sculpture installation Esiintymä (Occurrence) at the library cafe Sirius.

An additional artwork 'Sub Rosa' by Charles Sandison was installed during restoration of the old library entrance in 2011.