Louis Kahn

Estonian-born American architect whose late-period work — the Salk Institute (1965), Kimbell Art Museum (1972), the National Assembly of Bangladesh (1982) — re-introduced monumentality, mass, and natural light to a modernism dominated by lightweight steel-and-glass.

Kahn distinguished between "served" and "servant" spaces; he treated brick and concrete as load-bearing AND expressive ("What does a brick want to be?"). His teaching at Penn shaped a generation.

Died of a heart attack in Penn Station, NYC, with overdue passport stamps that delayed identification of his body for two days.