Unknown to me until the year 2023, the reason for this assembly on October 7, 2015 is renovation of the Spanish Steps initiated the very next day (2015-10-08) and not reopened to the public until a year later. The 138 steps built of travertine stone in 1725 and designed by Francesco de Sanctis, ascends a slope terminating with the Trinità dei Monti church of Rome.