Hasan was speaking at a national workshop organised by the department of museology, Aligarh Muslim University yesterday.
"Delhi has not got justice which it deserved as far as the issue of preservation of its architectural heritage was concerned," said Hasan.
He said that in recent years more than 250 monuments in Delhi have disappeared due to "gross negligence".
Different government institutions which were responsible for preserving historical monuments in the country's national capital were devoid of any broad blue print for saving the capital city's architectural heritage, the DG said.
"AMU owes it to its founder to preserve and protect its architectural heritage," he said.