Drake strikes oil and begins the American oil rush.

A group of men from Oil City receive a charter from the state to create the Oil City Oil Exchange.

Construction of the new Oil City Oil Exchange begins at 100 Seneca Street.

Averaging a daily trade of 10-14 million barrels of oil, the Oil City Oil Exchange became the third-largest financial exchange in the United States.

The Oil City Oil Exchange is closed due to declining business.

Pennsylvania oil boom ends.

The Oil Exchange building is sold to the National Bank and the original building is razed.

The Oil City National Bank is constructed in the Oil Exchange's place.

Mellon Bank, the last banking-related owner of the building, ceases operations and the building becomes vacant.

The building is purchased by Venango County and ownership is transferred to the Venango County Economic Development Authority.

Renovations begin.

5th floor renovations are completed and the first tenants move in.

100 Seneca at Cornplanter Square is rebranded to 100 Seneca.

The first floor "brewstillery" is projected to open in June 2025.