Casas del Tratado de Tordesillas
Casas del Tratado de Tordesillas (Houses of Treaty of Tordesillas in English) are two united palaces in Tordesillas, Spain. The negotiations that gave rise to the Treaty of Tordesillas took place there, through which Spain and Portugal shared the New World, giving rise to Ibero-America.
Source: Wikipedia — Casas del Tratado de Tordesillas (CC BY-SA 4.0)