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OTPA Quarterly Marker Cleaning 2025
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OTPA Community Historic Marker Cleaning Event

Plaza Park Fountain Plaza Circle, Orange, California, United States

Get hands-on with us as we teach you the basics of historic marker maintenance, cleaning and upkeep in our new quarterly Historic Marker Cleaning Day, this time right here in […]

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OTPA September FREE Preservation Workshop

The Wonders of Victorian Wallpaper! Not just a decorative touch, wallpaper in the Victorian era was a mirror of class, taste, technology, and values. This month’s OTPA FREE education workshop […]