Thomas D’Alesandro III, a former Baltimore mayor affectionately known as “Young Tommy” and member of a storied political family, died at his North Baltimore home Sunday of stroke complications. He was 90 years old. The oldest brother of U.S. House of Representatives Speaker Nancy Pelosi, Mr. D’Alesandro was mayor for one tumultuous term, from 1967 to 1971, that was marked by the 1968 riots, racial strife and strikes by city laborers, bus drivers and symphony musicians.

But it was also a time of rebuilding what even then was an aging city, and one that was losing both residents and political power to the growing suburbs. As Baltimore’s 42nd mayor, he opened schools, built a new police headquarters and pushed for open housing. Mr. D’Alesandro got Baltimoreans to approve an $80 million bond issue to build schools.