Puerta de Alcala, or Alcala Gate in Madrid. Banner with black ribbon as a symbol of mourning for those who have died during the coronavirus pandemic. 2019-nCoV, Europe, European, Madrid, Spain, architecture, black ribbon, city, cityscape, coronavirus, covid-19, disease control, downtown, empty, empty road, epidemic, infection, memory, mourning, outbreak, outdoor, pandemic, prevention, public health, quarantine, sky, street, symbol, travel, urban