Frei Otto, the pioneer of sustainability and lightweight structures was notified of the honor before his death on March 9.
Posthumous Pritzker Architecture Prize awarded to Frei Otto
Skeletons, Soap Bubbles and Spider Webs
frei otto receives the 2015 pritzker prize
Pritzker Prize Archives - Metropolis
40th Pritzker Prize Laureate Frei Otto Excelled in Lightweight
Frei Otto Archives - Metropolis
Celebrating Frei Otto's 2015 Pritzker Architecture Prize
Architect Frei Otto wins posthumous award - BBC News
Research, development and daring – Frei Otto wins the Pritzker Prize
Architect Frei Otto named Pritzker prize winner one day after his
Pritzker Architecture Prize - Wikipedia