This three-hour free event offers a chance to visit the Guildhall and its magnificent great hall in a City powerhouse that dates back to the twelfth century, before going on to look at the roman amphitheatre. A selection of paintings complementing the visit will be on display, and participants are invited to conclude their tour with a visit of the current exhibition 'John Bartlett – London Sublime' ((£5, £3 concs). Meeting point is outside exit 2 of St Paul's tube station by the Cafe Nero.