Hanuman Chalisa is hindi poem written by Mahakavi Goswami Tulsidas in the sixteenth century in praise of Lord Hanuman. It is very popular among a lot of modern hindus and is generally recited on Tuesdays (considered a holy day for devotees of Lord Hanuman).
The poem is called a chalisa as it contains forty (chalisa in Hindi) verses. The structure of the poem is extremely simple and rhythmic, thus making it all the more popular. The poem praises Lord Hanuman’s strength and kindness and recounts the Lord’s great deeds.
Hanuman occupies a unique place of reverence in the Hindu pantheon for his exemplary devotion to his Master and his unbelievable acts to serve the cause of his Master.