Srinivasa “Hal” Iyengar, an eminent structural engineer known for innovative solutions for difficult projects, such as the Guggenheim Bilbao Museum in Spain, died July 4 in Fort Myers, Fla., after a battle with Parkinson’s and heart disease. He was 85 years old.

Though born in China, I.M. Pei, who died on May 16 in New York City at age 102, became one of the most dominant American architects of his time.

I. M. Pei, the Chinese-born American architect who designed iconic landmarks around the world, died this week in New York City at the age of 102.