Muslim areas are identified by Masjids and they are very essential in safe guarding the Iman.
The Masjid is the heart of any Muslim community. Providing much more than a place of worship, many offer education and are a base from which essential community services are delivered.
The first and foremost duty performed by the Messenger of Allah SallAllahu 'alayhi wasallam upon entering Madina was to build a Masjid
He said, 'Whosoever builds a house (Masjid) for the pleasure of Allah, whether it is small or large, Allah builds for him a house in Paradise.'