This obituary is part of a series about people who have died in the coronavirus pandemic. Read about others here.

Vittorio Gregotti, an Italian modernist architect, theorist and city planner whose monumental projects included opera houses, arenas — like Barcelona’s Olympic Stadium — and even an entire suburb, died on Sunday at a hospital in Milan. He was 92.

Mr. Gregotti had been infected by the coronavirus and died of pneumonia, according to Michele Reginaldi, a former partner at his firm. Mr. Gregotti’s wife, Marina Mazza, was hospitalized with Covid-19, the disease caused by the virus, Italian news reports said.

As of Monday, Italy had recorded more than 24,700 confirmed cases of Covid-19 — the most outside of China — with more than 1,800 of them fatal.