I finally made it to Thaddeus Ropac’s new gallery in Ely House in Dover Street, once the home of the Bishops of Ely, designed by Robert Taylor in the early 1770s, occupied in the early part of the twentieth century by the Albemarle Club and in the post-war period by Oxford University Press.   It has been beautifully and immaculately restored by Annabelle Selldorf, keeping all the original fireplaces, but with new flooring throughout.   I luckily arrived just as a performance by Oliver Beer was ending in which maybe six singers explore the acoustics of the building through the performance of the Diabolus in Musica: