Nandi also known as Nandikeshwara or Nandideva, is the bull vahana of the Hindu god Shiva. He is also the guardian deity of Kailash, the abode of Shiva.
Nandi has the meaning of happy, joy, and satisfaction, the properties of divine guardian of Shiva- Nandi.
A lingam, sometimes referred to as linga or Shiva linga, is an abstract or aniconic representation of the Hindu god Shiva in Shaivism. It is typically the primary murti or devotional image in Hindu temples dedicated to Shiva, also found in smaller shrines, or as self-manifested natural objects.
Lingam is regarded as the “outward symbol” of the “formless Reality”, the symbolization of merging of the ‘primordial matter’ with the ‘pure consciousness in transcendental context.