In 1527, 1567 and 1626 the forts of Sancti Spiritu (Argentina) and San Juan (USA) and the colony of San Salvador de Quelang (Taiwan) were founded respectively. These three events and their rapid and sometimes dramatic outcomes represent milestones in the transoceanic history of the Spanish Crown between Charles I and Philip IV. The excavators will explain the results of the archaeological work carried out in these three places, sites that are emblematic of a century in which the Crown expanded its limits beyond the imaginable and whose consequences shaped the history of mankind in the Modern Age.