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On the sign:
[Emblem of the city of Madrid] JUNTO A ESTE LUGAR ESTUVIERON LAS CASAS DE ANA DE MENDOZA Y LA CERDA
PRINCESA DE ÉBOLI Y EN ELLAS FUE ARRESTADA POR ORDEN DE FELIPE II EN 1579
Ana de Mendoza y de Silva, Princess of Éboli, a Spanish noblewoman who had a close relationship with King Philip II. She was also on close terms with the king’s secretary - Antonio Pérez. After the secretary was banned due to suspicions of murder, Ana de Mendoza was also banned.
Translation of the text on the sign: [Emblem of the city of Madrid]
NEXT TO THIS PLACE WERE THE HOUSES OF ANA DE MENDOZA AND LA CERDA
PRINCESS OF EBOLI AND IN THEM SHE WAS ARRESTED BY ORDER OF PHILIP II IN 1579