Turkish President Recep Tayyip Erdogan cited Nazi Germany under Adolf Hitler to defend his controversial push to expand the powers of the presidency, local media reported on Friday.
Erdogan, the strongman of Turkish politics for more than a decade, is seeking a new constitution to transform his post into a powerful US-style executive "super-presidency".
"In a unitary system (such as Turkey's) a presidential system can work perfectly," Erdogan was quoted as telling reporters in Istanbul on Thursday on his return from a visit to Saudi Arabia.
"There are already examples in the world and in history. You can see it when you look at Hitler's Germany," he was quoted as saying.
Erdogan, emboldened by his Justice and Development Party's (AKP) landslide election win in November, has suggested holding a referendum on the proposed constitutional reforms.
Prime Minister Ahmet Davutoglu last week launched negotiations with other political parties on a new charter to replace the 1980 constitution drafted by the military after a coup that year.
In his comments on Thursday, Erdogan - seen by critics as increasingly authoritarian - called for large-scale public consultations on the reforms to try to ensure a "full societal agreement".
Despite regaining its majority in parliament in the November election, the AKP does not command the required two-thirds of seats needed to change the constitution without the support of other parties.