Agoston Haraszthy (/ˈɑːɡəstən ˈhærəsti/; Hungarian: Haraszthy Ágoston, Spanish: Agustín Hharaszthy; August 30, 1812, Pest, Hungary – July 6, 1869, Corinto, Nicaragua) was a Hungarian-American nobleman, adventurer, traveler, writer, town-builder, and pioneer winemaker in Wisconsin and California, often referred to as the "Father of California Wine", alongside Junípero Serra, as well as the "Father of California Viticulture," or the "Father of Modern Winemaking in California". One of the first men to plant vineyards in Wisconsin, he was the founder of the Buena Vista Winery in Sonoma, California, and an early writer on California wine and viticulture.