Dirck Jacobsz (1497–1567): Pioneer of Dutch Militia Portraits Dirck Jacobsz, whose exact birthplace remains shrouded in mystery—likely Amsterdam—stands as a pivotal figure in the burgeoning artistic landscape of 16th-century Holland. Born into a family steeped in painting tradition, he received his initial training from his father, Jacob Cornelisz van Oostsanen, establishing him firmly within the artistic lineage of his time. However,…