MILAN -- In a signal of rebirth, the Donizetti theater in the northern Italian city of Bergamo, devastated by the coronavirus pandemic, reopened this weekend after three years of renovations.But the planned gala celebration had to be postponed, and new productions for an annual festival dedicated to the city's native composer Gaetano Donizetti had to be streamed online from an empty theater.Festival musical director Riccardo Frizza said the autumn festival was envisioned as a life-affirming