Have you ever found yourself looking at a building downtown, admired its architecture and wondered what it looked like in the past? What businesses were there before?

Mapping Mill Valley History is a new project that invites you to tour familiar streets and buildings and see how they have evolved over the years. It’s a collaboration between the Mill Valley Chamber of Commerce and the treasure trove that is the Mill Valley Public Library‘s Lucretia Little History Room.

This week we’re touring the history of the O’Shaughnessy Building at 59-67 Throckmorton Avenue, across the street from the Mill Valley Market.

Since late 2018, the building has been occupied by a pair of businesses. Prevalent Projects debuted as a sleek home goods store and has grown its furniture business to the point of needing to expand into an adjacent space that was most recently a nail salon – and the Vintage Wine & Spirits shop (now at 82 Throckmorton across the street) prior to that. Prevalent’s neighbor in the building is Roja Rugs, a family-owned rug and home design business known for its gorgeous displays.

Join us for a glimpse into the building’s history through historical photographs, newspaper articles and advertisements.


If you have questions about this project or any of the buildings, people, or businesses mentioned please reach out to Natalie Snoyman, Supervising Librarian and Archivist of the History Room, or Jim Welte, Executive Director of the Mill Valley Chamber of Commerce. Curious about a particular building in Mill Valley and want us to feature it? Email Natalie or Jim.

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