At the beginning of the Pennsylvania oil rush, one of the first oil deposits was unearthed just north of Pittsburgh. From that time and well into the 20th-century, Pittsburgh was a major center of finance and home to the Pittsburgh Stock Exchange. The Pittsburgh Stock Exchange was originally known as Thurston’s Oil Exchange and opened in 1864. It operated until 1974 as a regional stock market, and at its height, 1,200 companies were traded on the exchange. Its original location from 1864-1903 was inside the Dollar Bank building now at…