Wonder what show this refers to
Legion: Life in the Roman Army at The British Museum - https://www.britishmuseum.org/exhibitions/legion-life-roman-...
The article is headed by The Guardian grouping link https://www.theguardian.com/culture/museums
The Greatest Show on Earth - Ringling Bros. | Barnum & Bailey Circus | et al.
an event at which a group of related things are available for the public to look at:
retrospective show of
They put on a retrospective show of his work at the National Museum of American Art.