Sir Michael Hopkins, architect of many popular modern buildings in the United Kingdom, has died at the age of 88 from vascular dementia.

His wife Patty, with whom he established and ran the London-based practice Hopkins Architects said in a statement: “Michael was obsessive about architecture and tenacious in refining a design until he was absolutely satisfied with it. He was usually (and annoyingly) right.” Viewed in purely stylistic terms, Hopkins’s work is considered, along with Richard Rogers and Norman Foster, part of the High-Tech movement that dominated contemporary architecture in the UK beginning in the 1970s. Unlike the work of his more famous contemporaries, however, Hopkins’s buildings each have individual character, emerging from simple yet bold architectural ideas as much as from relationships to context.