This could further delay the construction of the new Capital as the fresh designs are unlikely to be finalised before November.
Non-approval of the designs by the chief minister has cast a shadow on the the state government's scheduled foundation stone-laying ceremony for the Legislature Complex on September 30.
On July 12, the CM gave his "final nod" to the designs prepared for the Government City in Amaravati. On that day he asked Foster+Partners to "interchange" designs of the High Court and the Legislature complex and accordingly the British firm came out with fresh designs yesterday.
Naidu, along with ministers Yanamala Ramakrishnudu, P Narayana and Ganta Srinivasa Rao and senior officials, today inspected the designs and appeared not impressed.
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Though he was happy with the waterfront and the layout, he said the facade could "look much better".
"Some elements of the design are good but the facade has not come out well. There is a mixed reaction from the public, so take more time and come out with fantastic designs," the CM told the Fosters' team.
"Take the top 10 buildings of the world as an inspiration and come out with designs better than them," he said.
The award-winning British architects had designed some of the world's iconic structures like the 50 UN Plaza, Singapore Supreme Court, Imperial War Museum (UK), Century Tower (Japan), the Ireo City (Gurugram), Cyber Port (China), Bloomberg headquarters (UK), The Index (UAE), International Airport (Kuwait).
A press release from the Chief Minister's Office (CMO) said Rajamouli could soon be "made to fly to London", headquarters of Fosters, for delivering his advise.