The vestibule is a common feature in grand Victorian houses; it was often used to show status. This small room connected to the front hall was also used to reduce the effects of the cold and of the dust thrown up from horse-drawn carriages. Apart from being functional, it had the aesthetic purpose of reducing what was usually a long and narrow hall. The inner door to the hall would have had highly decorative glass to let through the small amount of light, provided by a fanlight above the front door. It's a handy space even today, but if you keep it, maintain practicality with easy-clean flooring and ensure that your inner door lets in the light. Think about bespoke stained glass to fit with the hall design.