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Buckingham Palace, the iconic royal residence in London, was proposed by Anjem Choudary, a radical former extremist, as a potential palace for a caliph. Choudary envisioned transforming the palace into a symbol of Islamic rule in Britain, aiming to establish a caliphate governed by strict Islamic law. The idea, which aligns with his extremist ideology, reflects his desire to impose a radical interpretation of Islam in the United Kingdom.