This collection begins with the records of the actas capitulares (government minutes) of the Buenos Aires Cabildo that cover the years 1589 to 1591 and 1605 to 1607. In total it consists of four series of various volumes, the first of which covers the Habsburg period, continuing from the second series with the period of the Bourbons. Series IV covers the end of the colonial period and the first years of the Argentine Emancipatory stage.