different institutions from around the world to set up Sala A-10. The Map of Céspedes Xeria was of primary importance to Taunay, and he sought to obtain a copy from the General Archive of the Indies in Seville. The facsimile of Céspedes Xeria's map was produced by the copyist Santiago Montero Díaz. Díaz, a copyist with extensive experience with works in the collection of the General Archive in Seville, utilized both versions of the map in the archive: Map 17 of Céspedes Xeria and Map 17bis of Céspedes Xeria. He additionally copied letters from Céspedes Xeria to Philip of Spain. Montero Díaz finished work on the facsimile in October 1917 and charge 200 pesetas (178 thousand réis) for the work. Taunay inaugurated Sala A-10 after receipt of the facsimile copy of the map and displayed it in a prominent place in the room. It was framed and displayed with its related documentation, also in facsimile format. Taunay used the map for articles published in Correio Paulistano, the Revista do Instituto Histórico e Geográfico Brasileiro, and the Annals of the Paulista Museum. Accuracy and authenticity Discussion about the faithfulness of the facsimile produced by Santiago Montero Díaz began in the late 20th century. Correspondence and comparative analyses between the original map and the facsimile demonstrate that Taunay was unaware that Montero Díaz used two versions of the map to produce the facsimile. However, the facsimile has few differences from the original versions or related documents. References Historic maps of the Americas 17th-century maps and globes 1620s in Brazil Colonial Paraguay