The new partnership was marked by a move in late 2016 to a new custom-built gallery at 26 Bury St., signalling the return of Colnaghi to St James’s after a hundred years in Mayfair. The renowned Colnaghi Library is installed at the heart of the gallery, while the Colnaghi Archive remains in the purpose-built archive building at Windmill Hill on the Waddesdon Estate, where it is more accessible to scholars.