The creation of these two new diocese had to the big demographic growth of the Archdiocese of Madrid that, at the beginning of the years 1990 arrived already to the 5 million inhabitants, of which around 90% are considered Catholics.
A creación destas dúas novas dioceses debeuse ao gran crecemento demográfico da arquidiocese de Madrid que, a principios dos anos 1990 chegaba xa aos 5 millóns de habitantes, dos cales ao redor do 90% son considerados católicos.