Administrative records from a Swiss bank were also seized during the operation
A tax evasion tip-off involving a Swiss bank has led to raids in five countries.
Dutch authorities said the investigation relates to 'thousands' of suspicious accounts.
Suspects are accused of concealing millions of euro by placing them in Swiss bank accounts.
A spokeswoman for Dutch prosecutors said millions of euros worth of goods - including paintings, gold bars, cash and other assets - were seized in swoops on addresses linked to 3,800 Dutch accounts.
They made two arrests at homes in The Hague and Hoofddorp.
Searches were also carried out in Zwolle and the municipality of Venlo.
Administrative records from the Swiss bank were also seized.
As well as operations in the Netherlands, coordinated raids were carried out in Australia, Germany, the United Kingdom and France.
Prosecutors added they had acquired information "about thousands of account holders".
Both Dutch and British authorities said more operations will be carried out in the coming weeks.