Casa da Passarella sits in Dão, the Beiras subregion of Central Portugal known for structured reds built on indigenous varieties. The winery works primarily with Touriga Nacional, Alfrocheiro Preto, Jaen, Baga, and Tinta Roriz—grapes that thrive in Dão's granite-based soils and continental climate. Villa Oliveira Vinha das Pedras Altas, a blend of Touriga Nacional and Alfrocheiro Preto, and Vindima, a five-variety field blend, both achieve 94-point averages from prestige critics including Wine Enthusiast, Decanter, Wine Advocate, Falstaff, and Wine Spectator. O Fugitivo Vinhas Centenárias, drawn from older vines and combining Alfrocheiro Preto, Touriga Nacional, and Tinta Roriz, scores 93.3. These wines reflect Dão's signature character: dark fruit, mineral tension, and the tannin architecture that defines Portugal's most serious red-wine region.