An English tourist accused of defacing the Colosseum has said he was not aware of the age of the ancient monument. Ivan Dimitrov, a 27-year-old fitness instructor living in Bristol, wrote a letter of apology to the Rome mayor, Roberto Gualtieri, after allegedly engraving his and his girlfriend’s names into an internal wall of the 2,000-year-old landmark with a key. In the letter, Dimitrov, who was traced by Italian police to England after a five-day search, wrote that only now did he realise “the seriousness of the deed committed”. “Through these lines I would like to address my heartfelt and...