After the first oil discovery in Tulsa, Oklahoma in 1901, an even larger discovery was made in 1905 in nearby Glenn Pool. This would lead to Tulsa’s golden age of the 1920s and its title as the "Oil Capital of the World." Many early oil companies chose Tulsa for their home base. By 1920, Tulsa was called home to almost 100,000 people and 400 different oil companies. Today, Tulsa continues to have a thriving oil industry. Photo by Kathy Weiser-Alexander.