Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Oella Maryland -  Oella is a small historic mill town on the Patapsco River in western Baltimore County Maryland located between Catonsville and Ellicott City. It is a 19th century village of millworkers' homes.
Building