Among the 800 hectares of property upon which Alentejo’s Herdade de Coelheiros grows walnuts and cork trees sits about 50 hectares of vines. Though their history date back to the mid-1400s (as a hunting estate), those vines that source Coelheiros’ modern wines were replanted over 500 years later, in 1981. That’s because under Portugal’s dictatorship,…