Discover a true piece of Texas history with this rare Pioneer Castroville Home - the Mangold-Holzhaus-Holmgreen House at 413 Petersberg. One of Castroville's earliest rock-and-plaster homes (pre-1855), this designated historic property is listed in the National Register of Historic Places and has been lovingly preserved by the Mangold, Holzhaus, and Holmgreen families. Built as a classic Alsatian-style cottage with 18-inch thick walls, the home features original cypress beams and loft flooring, a heart-of-pine mantel adorned with distinctive stars, and a fascinating evolution from its original single-room layout with root cellar and sleeping loft. A circa-1910 enclosed porch addition and thoughtful 1980s restoration by the Holmgreens (who added modern kitchen and bath facilities while preserving the home's authentic character) make it livable while honoring its pioneer roots. This is a home for the discerning buyer who appreciates Early Texas furniture, handcrafted details, and deep local provenance. It is decorated with original, and period pieces - all telling the story of Castroville's founding by Henri Castro and the Alsace-Lorraine settlers who helped shape Texas. Extremely rare on the market - this property has not been offered for sale since the Holmgreens acquired it in 1981. Historic homes of this caliber and pedigree are highly sought after by antique enthusiasts, history lovers, and those wanting an authentic connection to Texas pioneer heritage. Castroville's charming small-town atmosphere, combined with proximity to San Antonio, makes this a singular opportunity. Don't miss your chance to own a documented piece of Texas history. Schedule your private showing today.