More than 400 delegates of the 141-member Organisation of Islamic Capitals and Cities (OICC) are expected to participate in the conference, the Saudi Press Agency (SPA) said Tuesday.

It quoted Mayor of Makkah Osama bin Fadhel Al-Bar as saying that Saudi Arabia King's patronage of the three-day conference embodies his keenness on supporting the works of OICC to achieve sustainable development and preserve the cultural identity and heritage of the member capitals and cities.

The OICC is an international non-governmental and non-profitable organisation with its headquarters located in Makkah and Jeddah cities.