[2] In the cadastre documentary data were collected on the ownership of Madrid properties and other features such as previous owners, map showing the plots into which each manzana or block was divided, description of the configuration and structure of each building, size and quality of the building, indication of the name and number of tenants housed per room, the tax status according to the aposento charged, among other indicators.
This identification done by the general visit resulted in a white tile being laid on every house with writing in blue letters indicating the number assigned: "Visita G. Casa nº123" (General Visit House # 123).
[2] The initial intentions of the Marqués de la Ensenada was to renew the tax system in Castile.
It was repealed by Marqués Viudo de Pontejos who replaced it with a more logical which consisted of identifying streets with names of famous persons and historical events.
The white numbered tiles that were laid by officials during the survey are still evidenced on the façade of Madridean houses especially in the historic center of Madrid.