Turkey: The torch relay leg in Istanbul, held on April 3, started on Sultanahmet Square and finished in Taksim Square. Uyghurs living in Turkey protested at Chinese treatment of their compatriots living in Xinjiang. Several protesters who tried to disrupt the relay were promptly arrested by the police.
Is there an answer to this question (If it cannot be answered, say "unanswerable"): Where did the torch start in Instanbul?
Sultanahmet Square