Norman Foster has led tributes to Richard Rogers, who died yesterday aged 88.

Foster described Rogers as his “oldest and closest friend” and a kindred spirit for 60 years.

“Richard Rogers was a great pioneering architect of the modern age, socially committed and an influential protagonist for the best of city life – such a legacy,” he wrote in a piece published on Building Design.

Ivan Harbour, a director of the practice founded by Rogers, described him as “a unique and wonderful human being” to whom he owed so much.

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