 Arka, Mitra, Aditya, Tapan, Ravi and Surya have different characteristics in early mythologies, but by the time of the epics they are synonymous.The term "Arka" is found more commonly in temple names of north India and in the eastern parts of India.The 11th century Konark Temple in Odisha is named after a composite word "Kona and Arka", or "Arka in the corner".