Charles Lockhart (1818-1905)
The largest crude oil refiner in Pittsburgh in the 1860s. Lockhart, Frew & Co. merged its seven refineries with Standard Oil in 1874. Lockhart served on the board, managing 80% of US oil refining, transport, and marketing. One of the original firm's offices was here.
David Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford Libraries
Marker data: Pennsylvania Historical and Museum Commission via data.pa.gov
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