A remarkable painting by the Antwerp painter Maerten de Vos, 'Moses Showing the Tablets of the Law to the Israelites', shows wealthy merchants, artists and poets, a ground-breaking botanist, a pioneer in women's education, and the greatest publisher of the age gathered around a portrayal of Moses and Aaron with the stone tablets of the law engraved with the Ten Commandments in Dutch. In searching for an answer to the question of what brought together...