The classic Barcelona apartment building, in which most of its inhabitants live, was built at the end of the 19th or start of the 20th century in the art nouveau architectural style for which Barcelona is world-renowned. The Eixample area of Barcelona was built in the late 19th century, almost in its entirety, in the art nouveau style. The Eixample is made up of city blocks that are hollow in the middle. In this context, it is normal to talk of apartments as being either ‘interior’ or ...