circusmuseum.nl
Enjoy the fabulous collection of historic circus ephemera at circusmuseum.nl. There are thousands of colour lithographic posters from the Hamburg printing firm of Adolph Friedländer, each one catalogued, digitised, and available on the web. The website nicely explains, in Dutch and in English, the provenance of the collection.
Among the thousands of European items there are a few with Australian connections, including posters for the Ashtons and Bullens troupes.