The real spirit of a town can be often heard and felt in its typical music. The acoustic sentiment of Lisboa is the Fado music which you will find in a lot of restaurants each evening somewhere at the old town named Alfama. The name Alfama most probably has its origin in the Arabic word الحامة (al-hamma) which is meaning bath or fountain. During the time of the Moorish seizure of the Iberian countries the Alfama comprised the whole ancient town which lateron grew to the contemporary Baixa.
The influence of the former Moorish residents is still vivid in architecture or typical Portuguese floral ceramics but also in the Fado music while the gloomy and sentimental sound is reminding me really to the melancholic desert music of the Sahara nomades at the Maghreb. Today people quite often only speak about things which separate us from each other, but our European culture was on a large scale influenced also by the Arabic world which saved for example the heritage of Greek philosophy, even our figures 1-2-3 are Arabic while the Arabs use nowadays the Indian ones in daily life, quite strange at all.
So in case you visit Lisboa sometime in your life, do not miss a Fado life performance at night because otherwise you have not really been there.