The business of the architect is to make the designs and estimates, to direct the works and to measure and value the different parts; he is the intermediate agent between the employer, whose honour and interest he is to study, and the mechanic, whose rights he is to defend.
His situation implies great trust; he is responsible for the mistakes, negligences, and ignorance of those he employs; and above all, he is to take care that the workmen's bills do not exceed his own estimates. If these are the duties of an architect, with what propriety can his situation and that of the builder, or the contractor be united?
Sir John Soane
1788 defining the professional responsibility of an architect