Pittsburgh’s Oldest Commercial Building Is a Sandstone Tavern on Greentree Road. Here’s Its Story.

Sometime around 1782 — possibly earlier — a trader named Daniel Elliott built a sandstone tavern along the road connecting Washington and Pittsburgh, and travelers heading into the frontier started stopping there for a drink, a meal, and a place to sleep. That building is still standing. It sits at 434 Greentree Road, two stories…