In the seaside town of Sesimbra, just 24 miles south of Lisbon, resides the charming Chapel of Espírito Santo dos Mareantes (Chapel of the Holy Spirit of the Navigators). Founded by a confraternity of local seafarers and fishermen sometime during the late 14th-15th centuries. The religious sanctuary also included a hospital and meeting space underneath. On this lower floor, poor and sick sailors were given succor. While convalescing or conversing, several of these maritime men drew pictures of boats on the walls, vessels they were most likely familiar with and…