The founder of the Sikh religion Guru Nanak and the last two gurus, Shri Tegh Bahadur and Guru Govind Singh had stayed several times in the city for long periods, adding to the glory of Ayodhya. The memories of these grace religious leaders are still preserved in the many ‘gurudwaras’ (Sikh shrines) built on sites sanctified by association with these divine souls that had preached goodness to the mankind. Ayodhya has also about 25 temples belonging to the down-trodden and backward castes, which exemplifies the truth that all human beings are equal in the eyes of God and that high or low castes do not matter to him at all. Ayodhya contains temples, virtually from all the states, including the former princely states as well as Nepal. Presently, Ayodhya Research Institute (Ayodhya Shodh Sansthan) is documenting the footprints of Lord Ram across the globe and recording tangible and intangible legacy of the Ramayana era.