Where is Illinois second state capital?

"Wishing to site the capital in the state's interior, the first General Assembly petitioned Congress for a grant of suitable land. Congress offered, and the state accepted, a land parcel on the Kaskaskia River about eighty miles northeast of Kaskaskia. This location, which would be named Vandalia, Illinois.
In 1820, with the completion of the new, or "Second", capitol, Vandalia became the capital of the state."