The stairs have to be a sweeping design, curving up from the foyer to the first floor landing.
Unfortunately there was no room to have a grand staircase rising from the centre of the foyer to a small landing before splitting to either side, so instead, we are looking for the most gracious sweeping staircase that we can find.
The steps will be in the same stone as the foyer, and the balustrading will match that of the Juliet balconies on the front of the house. There is a divine cast iron and gilt balustrade in the Petit Trianon at Versailles:
There have been many blog posts about the stairs at the Petit Palais in Paris. This sort of staircase is the one we are likely to settle on.