<prompt> Translate the following text to EnglishPiazza di Napoli ni moja ya majumba ya sanaa ya kisasa ya wazi iliyoundwa na Giuseppe Valadier, mbuni wa Napoleon.  <response>: Its outdoor tables are a perfect vantage point for admiring the gracefully curving piazza, an exemplary piece of open-air urban theater designed in 1816 by Giuseppe Valadier, architect to Napoleon. 