Looking down from a high vantage point, we se boy pupils seated as they gather in front of the Headmaster during morning assembly at the City of London School for boys in central London. Individual faces in neat rows stretch into the distance as we look past the Headmaster who is addressing, facing his students. Some seem serious, a few are looking bored while one boy can be seen coughing into his hand and another looking away with a smirk. We can see a diverse range of ethnic backgrounds, skin colours and hairstyles. The City of London School (CLS) is a boys' public school on the banks of the River Thames. It traces its origins to a bequest of land by John Carpenter, town clerk of London in 1442. The City of London has a resident population of under 10,000 but a daily working population of 311,000. The City of London is a geographically-small City within Greater London, England. The City as it is known, is the historic core of London from which, along with Westminster, the modern conurbation grew. The City's boundaries have remained constant since the Middle Ages but it is now only a tiny part of Greater London. The City of London is a major financial centre, often referred to as just the City or as the Square Mile, as it is approximately one square mile (2.6 km) in area. London Bridge's history stretches back to the first crossing over Roman Londinium, close to this site and subsequent wooden and stone bridges have helped modern London become a financial success.