A Turkish mayor is being sued for using public money to build a 6-metre statue of a robot in the capital of Ankara.

Turkey's Chamber of Architects and Engineers (TMMOB) filed a criminal complaint against Mayor Melih Gökçek over his controversial decision to erect a giant statue of a robot, local media reported.

At first it was believed that the statue was an April Fool's joke, but bemusement quickly turned to anger when it was revealed how it had been paid for.

The statue, which resembles a Transformer but cannot be named as such due to copyright issues, was erected at a crossroads to promote the city's new themepark, which has been described as a "prestige project" by the mayor.

(ADEM ALTAN/AFP/Getty Images)

It is just a few kilometres away from President Recep Tayyip Erdoğan’s new palace.

A total of 20 robots will be included at the new theme park when completed, according to broadcaster CNNTürk.

The robot at the centre of the row has been described by TMMOB representatives as a "monstrosity" who have attacked the perceived waste of taxpayers money.