By Brandy McDonnellFeatures Writerbmcdonnell@oklahoman.comSHAWNEE — Oklahoma’s oldest art museum is celebrating its 100th birthday with the first in a series of special exhibitions and festivities. Founded in 1919, Shawnee’s Mabee-Gerrer Museum of Art is starting its centennial celebration with the exhibition “Celebrating a Century: Treasures from the Mabee-Gerrer Museum of Art,” on view through March 24. Father Gregory Gerrer, for whom the museum is named, was a Benedictine monk of notable artistic talent.Read more on NewsOK.com