The Israeli onslaught on Gaza demolished 73 mosques in 51 days, while 205 others were partially destroyed, a government report said.
According to a committee formed by the Palestinian Economic Council for Development and Construction, the damages caused by Israeli aggression on houses of worship, tombs, and charity offices amount to $40.4 million.
The only two churches in Gaza were also hit and partially damaged, while the gates of 10 tombs were destroyed.
The affected mosques represent one-third of Gaza's mosques, the committee said.
Among the destroyed mosques were historical ones, particularly Al-Omari Mosque in Jabalya which dates back to 649 AD.
The mosque was built 1,365 years ago during the rule of the Muslim leader Amr Ibn Al-'As and was named after him. It is also called Manarat Al-Zaher.
It consisted of three floors and its area was greater than 3,000 square metres. It could accommodate more than 2,000 worshippers.
Al-Omari Mosque was previously hit by Israeli strikes in 2008 and 2009 and later renovated, but it was completely destroyed in the most recent assault.
The report added that most of Gaza's mosques were built thanks to donations by citizens since donor countries exclude houses of worship from reconstruction aid.
The targeting of mosques by Israeli warplanes in the latest offensive was three times higher than in 2008 and 2009, the report said.