Mrs Rosa Entrecanales, responsible for the Heritage Area in Ávila Town Hall, welcomed us. The Town Hall, in charge of approving and awarding licences to undertake work in heritage buildings, through its representative advised us in reference to the location of historical information, particularly technical plans. This information included the citadel plans located in the General Archive of Simancas, dated to the XVIII century, where ancient buildings and structures, as the alhóndiga (cereal warehouse and selling point) or the barbican appear. Here we have one of the main challenges of this project, which is how to merge historical and current graphic sources.