As per Hindu religion for every householder it is advised to perform panchayatan puja. This puja they say includes worshiping of five major deities namely - Surya, Devi, Vishnu, Ganapati and Shiva.
It is recommended that one should keep idols of these five deities in the shrine in the specific arrangement.
Depending on one's aradhya or ishta daivat the arrangement of these deities varies. For example devotees of Lord Ganapati, almost all Maharashtrians, will keep idol of Ganapati at the center and then idols of other deities around Ganapati. This is called Ganesh Panchayatan. In this way there are four more panchayatan arrangements - Shiva panchayatan (Shiva at center), Vishnu panchayatan (Vishnu at center), Surya panchayatan (Surya at center) and Devi panchayatan (Devi at center).
Typical Ganesh panchayatan arrangement will look like below