As well as penguins, he stole spoonbills, egrets and macaws.
They abseiled through skylights to steal some of the world's rarest books. They left DNA at the scene.
The 200 works included books by Goya, Galileo and Isaac Newton.
White grains of sand from Sardinia's pristine beaches are considered precious and are a protected resource.
The burglary from the Singer Laren museum, located 32 kms south-east of Amsterdam, occurred on what would have been the Dutch master's 167th birthday.
Six people including five teenagers and a 39-year-old woman who had accompanied her daughter to the Lanterna Azzurra nightclub in Corinaldo, were killed in the stampede on December 8, 2018.
The bizarre particularity of the operation? No petrol pump was forced or syphoned from.
A quartet has gone on trial accused of stealing a huge €3.75 million gold coin from a flagship German museum.