Kathak evolved as an expression of devotion towards Lord Krishna. Studies suggest that Kathak originated in Varanasi and this dance form traveled through Lucknow, Jaipur, and other parts of North and North West India.
The Lucknow tradition of Kathak believes that Lord Krishna appeared in the dream of his devotee, named Ishwari. He instructed her to develop dance as a form of worship, in her dream. Ishwari developed Kathak as a dance form and through her descendants preserved the learning and development, yielding the Lucknow Gharana of Kathak.
Kathak in the Bhakti movement era revolved around the theme which portrayed the immortal love between Radha, Krishna, and the milkmaids (Gopis).