In this room, one of the main rooms of the Museum, a set of pieces related to the Battle of Aljubarrota is exhibited. This battle was fought on 14 August 1385 between King Dom João I of Portugal and King Dom João I of Castille and it was decisive for the consolidation of the national independence.

King Dom João I had a special devotion for Saint Mary of Guimarães, whom we nowadays know as Our Lady of the Olive Tree. Dom João I asked this Saint’s divine protection even before the Battle of Aljubarrota. And later, he came to thank Her for having won such a decisive battle.

Besides his weapons, Dom João I offered Her the Gambeson he wore at the fray and the silver gilt Triptych representing the birth of the Child Jesus. Dom João I is also responsible for the renewed temple of Saint Mary of Guimarães, whose commemorative inscriptions, from the foundation and from the consecration, can be seen here.