Use stream of consciousness to answer the following. Columbus is the county seat of Franklin County. The city proper has also expanded and annexed portions of adjoining Delaware County and Fairfield County. Named for explorer Christopher Columbus, the city was founded in 1812 at the confluence of the Scioto and Olentangy rivers, and assumed the functions of state capital in 1816.

Answer this question based on the passage: when did columbus become ohio's state capital?
The important part for answering this question is: Named for explorer Christopher Columbus, the city was founded in 1812 at the confluence of the Scioto and Olentangy rivers, and assumed the functions of state capital in 1816. Final answer: 1816.