Amsterdam  - The Frans Hals Museum in Haarlem in the Netherlands announced the discovery of another previously unknown painting by the Laughing Cavalier painter Frans Hals (1583-1666).

It is the second time within four days the museum has made such an announcement.

On Sunday, the museum confirmed that five formerly unknown paintings were also made by the Dutch master.

Pieter Biesboer, spokesman for the museum, said the sixth painting was discovered at auction house Christies in Paris.

Bierboer saw the painting first in June.

The painting is a portrait of an unknown man and dated 1655.

Frans Hals is one of the most famous masters from the Dutch Golden Age.

Many of his paintings disappeared over time, and experts estimate that between 140 and 220 paintings should be attributed to him. (dpa)