This block is located on the corner of E Main and S Prospect at 135 E Main St in Ravenna, Ohio. This building is home to Ravenna Nutrition, the Ravenna Chamber of Commerce, The Pioneer Group, Vince's Barber Shop, Beautiful You by Denise, and ten apartment units.

Riddle Block 11 was built in 1914 by P.L. Frank, a prominent local builder. Frank was married into the Riddle family. Riddle and Frank used European architecture to help construct this building. Block 11 was the last to be constructed by Riddle. Block 11 features a central pediment and a giant skylight in the center of the structure.

Immigrant laborers lived in the apartments until they could afford houses. The C. M. Waller Hardware Company, Leona Whisler Dance Studio, several attorney offices, Caris Grocery, and a few optometrists all filled the block. The Riddles made the upper floors residential to ensure that buildings would not be left vacant in the event of an economic downturn.

Eric Hummel bought this Riddle Block around 1997. There has been no big changes to the building structure, but Hummel has fixed up the commercial spaces and remodeled some apartments in 2014.