Dalmau de Queralt, Count of Santa Coloma (?-Barcelona, 1640), Catalan Noble and Viceroy of Catalonia (1638-1640) faced France’s attacks in Rosselló (1639-1640). However, he got the hatred of an important segment of the population when he was forced to submit to the centralist politics of Madrid. He faced Francesc de Tamarit and Pau Claris. He was murdered during the War of the Segadors.

The origins of the documentation related to this authority come from Dalmau de Queralt's private secretary. The Count of Santa Coloma and Viceroy of Catalonia was murdered during the so called Corpus de Sang (7th of June 1640). During the search, ordered by the deputies, of the convent of Sant Francesc and some other private homes, they found letters that were given to the Diputació del General. These letters ended up there before the fire occurred in the Palace of the Viceroy.

The Count's home was also searched in October 1640 and more documentation was confiscated and sent to the Archive of the Council (Archivo de la Diputación). It is known that some letters of the Count of Santa Coloma that were considered offensive to Catalonia were read in the Junta General de Brazos in 27th of November 1640. Some years later, in 1650, a process was conducted to figure out the authenticity of the letters appearingly written by the Viceroy of Santa Coloma, the Count Duque de Olivares and the King.