Banksy has emerged as a possible white knight in a long-unrealized plan to transform the vacant prison where Oscar Wilde was once held into an art center. Reading Gaol has been up for sale since 2019 and, without a better offer, could potentially be turned into apartments. The famed street artist has offered to sell the stencil he used to paint a mural on the facade of the famous building in March. The sale could raise £10 million ($13.3 million) to support the Reading Borough Council’s effort offer to buy the grade II listed historic building in Reading, which is around 40 miles (64 km) west of London. Earlier this…