Pink Floyd were admirers of the Monty Python comedy group, and helped finance their 1975 film "Monty Python and the Holy Grail". In 2016, Pink Floyd became the second band (after the Beatles) to feature on a series of UK postage stamps issued by the Royal Mail. In May 2017, to mark the 50th anniversary of Pink Floyd's first single, an audio-visual exhibition, "Their Mortal Remains", opened at the Victoria and Albert Museum in London. The exhibition featured analysis of cover art, conceptual props from the stage shows, and photographs from Mason's personal archive. It was extended for two weeks beyond its planned closing date of 1 October.