Ordinarily it is difficult for officials to estimate the crowd size for a concert in Central Park. But every attendee at Thursday night’s free performance there by the superstar crossover tenor Andrea Bocelli had to have a ticket, obtained in advance. And 60,000 were given out.

The chilly, rainy weather, which during the first half of the program turned the Great Lawn into a sea of umbrellas, may have kept the crowd a little smaller than 60,000. But the tight security measures, with pat-downs and bag searches for everyone entering, meant that anyone trying to crash the show would have gotten no closer than the park’s cordoned-off pathways.