Nandikeswara is Shiva’s mount and one would find this image in front of all Shiva temples. Devotees worship Nandikeshwara first before entering the temple.
I have seen some magnificent figurines of Nandi in various temples during my travels. Sharing a few pictures here. These are huge monolithic carvings in granite and soft stones.
shall be back with more.
Tanjore Big temple
Hampi temple
Gangaikonadan temple
Chamundi hill , Mysore
Lepakshi Nandi
Bull temple Bangalore.
Hampi temple
My Memoirs 
I think I have seen all of these.They are magnificent.
thank You Kp.
Wow .. awesome., feel like going there to see them.
Thank you Renu. Do visit, you would enjoy.