Wolters says this incident has been reported to the police as a willful damage incident – and there are several others.
"Francis Upritchard's work Loafers, has had a piece stolen from it. This is currently undergoing assessment for repairs. The Five Rams in Myers Park and the Matakana War Memorial have sustained wilful damage and are currently undergoing assessment for repairs."
Police are also aware of a fifth sculpture, which has been stolen from the Pah Homestead in Hillsborough.
The sculpture, Split by Marté Szirmay, is valued at $40,000 and thieves were caught on CCTV bundling it into the back of a silver sedan.
While the two men were recorded stealing the bronze artwork, they were wearing hoods and masks, and are difficult to identify.
Police have asked that anyone with information about the whereabouts of the sculpture, or who saw something suspicious in the vicinity, contact them on 105.