Simultaneously silly and seriously somber, Michael Graves’ Clos Pegase Winery is one of the few self-conscious works of architecture in Napa Valley. Designed in Graves’ mature postmodern style, the winery freely mixes neo-Palladian, Roman and Tuscan architectural motifs, with a hint of rural barn vernacular forms and resides comfortably within Calistoga’s Mediterranean agricultural landscape of vineyards and oak scrub.