<prompt> Translate the following text to EnglishJengo hilo la kihistoria la jiji la Roma lilianzishwa mwaka 1296 na Arnolfo di Cambio, ingawa jengo hilo la kihistoria la kijani kibichi, nyeupe, na rangi ya waridi lilikamilishwa karne sita tu baadaye.  <response>: The very heart of the citys centro storico, it was begun in 1296 under Arnolfo di Cambio, although the imposing green, white, and rosemarble neo-Gothic facade was completed only six centuries later. 