Flanagan House Museum or Pettengill-Morron House Museum. Flanagan House Museum was built in 1837 on Peoria’s east bluff by John C. Flanagan and is the oldest standing house in Peoria. This American Federal style house offers a spectacular view of the Illinois River Valley. Flanagan, a young Philadelphia lawyer, came to settle his father's estate of 600 acres. John became entranced by the beauty of
the Illinois River Valley and decided to settle, build and become a land developer. Designed in the Federal style, Peoria Historical Society acquired the house in 1962 and it was placed on the National Register of Historic Places in 1975. Exquisite Empire furnishings and period artifacts are displayed in room settings on two floors. 18th and 19th century Peoria area history exhibits and the story of the Peoria distillery industry are also featured. Special events are held throughout the year. Collections of antique glass, china, furniture, toys, quilts, tools, and vintage clothing are displayed. The house is on the National Register of Historic Places and is owned by the Peoria Historical Society. It is also the headquarters of the Daughters of the American Revolution (DAR), Peoria Chapter.