Adjoining the southern border of Pittsburgh, Dormont is a small, independent borough whose name means "mountain of gold" in French. The borough developed rapidly even before its incorporation in 1909. In the early 1900s, the extension of Pittsburgh's railway system, the opening of the Liberty Tunnels, and the building of the Liberty Bridge, along with the recreational opportunities the borough has to offer, encouraged many families to settle and escape the pollution of Pittsburgh's steel mills. Through the years, the direct access to the city's business and cultural areas has drawn residents to the historic borough.