Dona Maria operates in Alentejo, Portugal's expansive southern wine region, where warm continental conditions and diverse soils yield bold, structured wines. The winery focuses on indigenous Portuguese varieties. Its Júlio B. Bastos Alicante Bouschet—a dark, tannic expression of the Alicante Bouschet grape—has drawn attention from Wine Enthusiast, Wine Advocate, Wine Spectator, Decanter, and Falstaff. The Reserva Touriga Nacional, built from Portugal's signature red variety, and the Reserva Arinto, a white from the crisp Arinto de Bucelas, round out the portfolio. These wines reflect Alentejo's capacity for ripe, concentrated fruit balanced by the region's mineral character.