Art review Sinister life from City's underbelly

Build anywhere in the City of London and you will have archaeologists watching every move your bulldozer makes.

- Jonathan Jones

When Bloomberg planned its European headquarters it incorporated the ancient Roman Temple of Mithras in a basement, displaying finds made during the pre-construction dig in a gallery that also shows contemporary art. Now the Newcastle-born twins Jane and Louise Wilson have taken a long, hard look at four of those finds, wooden posts or stakes that are about 2,000 years old. It's thought they supported a crossing over the River Walbrook.