One of California's most significant historic buildings was, at the time of its unveiling, the grandest wine cellar in California. It was the site of many firsts in the state's wine world, including the first caves dug for wine storage, the first stone winery, and the first gravity flow winery. Renovated stone by stone with noted historical architect Naomi Miroglio, the building underwent essential masonry restoration and structural strengthening. Mortar was removed from between the stones to reveal the edges of each individual stone and replaced with mortar consisting of Natural Hydraulic Lime. After surviving the great earthquakes of 1906 and 1989 with damage, the building required extensive strengthening to reopen to the public, including the use of Center Core Drilling, in which a 38 foot long core is drilled into the center of the wall, fitted with a steel rod, and filled with grout.