The most fundamental of Hindu deities, is the Trinity of Brahma, Vishnu and Shiva - popular deities include Ganesha, Krishna, Hanuman and goddesses like Lakshmi, Durga,Saraswati.
Symbols of Shiva - Yoni
The linga is installed on a base. This base has two functions: firstly to hold the linga erect; secondly to serve as a basin and collect the water poured over the linga.
Sometimes this base is considered as a yoni or bhaga, representing the mother-goddess, Shiva's consort.