New year, new competition! For the chance of winning a bottle of champagne, readers are asked to spot the deliberate changes we've made to this famous building, Ronchamp. Post your answers to Ring the Changes, 151 Rosebery Avenue, London EC1R 4GB, or fax 020 7505 6701. Clue: there are six changes to ring. The first correct entry pulled out of the hat wins a bottle of bubbly. The winner of the last ever Archicharades competition (AJ 19/26.12.02) was Stan Little of John C Goom Architects in Evesham, who correctly identified Santiago Calatrava.