the palacio de communicationes -located at plaza de cibeles- used to be madrid’s central post office but since its rennovation in 2007 it is used as the city hall.
it does not only serve as the city hall but also as a cultural center; hosting various exhibits on the top floors, free wi-fi, a cafe and a restaurant, social areas with comfortable sofas to read the newspaper or books about madrid.
“Madrid’s Palacio de Cibeles recently underwent a stunning renovation that respectfully preserved the beautiful old building while creating a friendly cultural center that is open to the public. Dubbed CentroCentro and designed by Arquimatica architectural studio, this jaw-dropping modern space offers Spanish citizens and visitors to the capital, a place to exchange cultural information and engage in contemporary life and culture. CentroCentro is the perfect example of how an architectural building from the beginning of the 20th century can be brought up to date with contemporary sustainable building strategies – from green materials and natural light optimization to resource conservation and energy-efficient systems.” source
for only 2€ you can purchase a a timed ticket to access the “mirador de cibeles”: the observation deck on top of the building, which offers amazing views over madrid.
the city hall is located at plaza de cibeles, between the city center, the retiro park and the museum mile “paseo del prado”.