Imperial diptych offerings to the emperor. However, the fact that the Barberini ivory was almost certainly not a diptych, but some kind of imperial icon without a second panel is a serious argument against the existence of the imperial diptych type. The two panels representing the empress Ariadne, in the Bargello in Florence and the Kunsthistorisches Museum in Vienna, also belong to the hypothesied imperial diptych type. They are the only central panels of such a diptych (other than the Barberini ivory) to survive, since all other fragments of such diptychs are from side panels. Imperial diptych In Late Antiquity, an imperial
Imperial College London held by Alice Gast, an American chemical engineer, since September 2014. In 2012, the additional post of Provost was created. James Stirling became the first Provost of Imperial College London in August 2013. He was succeeded as Provost by Ian Walmsley in September 2018. The council is the governing body of Imperial, it consists of 23 members including the Chairman, the President, the Provost, the President of the Imperial College Union, 4 members of senior staff, and between 9 and 13 lay members who are not employees of Imperial. The current Chair is Sir Philip Dilley. In 2017/18, Imperial had