Léon and Rob Krier are Luxembourg-born architect brothers renowned for their influential work in architecture and urban design. Léon Krier, born in 1946, is known for advocating traditional architecture and urban planning, strongly opposing modernist styles. His work emphasizes human-scale development and classical forms, influencing projects like Poundbury in England. Rob Krier, born in 1938, is also an architect, urban planner, and sculptor, known for integrating art and architecture. He has contributed significantly to postmodern urbanism and authored pivotal texts on spatial design. Together, the Krier brothers have shaped discourse around sustainable and livable cities rooted in historical principles.