“Chattāri Maṅgalam” is not written by any one known human author.

• It is an ancient Jain mangal‑sutra (auspicious verse) in Prakrit, coming from the early Jain scriptural tradition.
• Like the Navkar Mantra, it is considered “paramparāgat” (traditional) – passed down from the time of the Kevali Bhagwans and Gaṇadhars, so no single writer’s name is given.
• Both Śvetāmbara and Digambara traditions accept this verse, with only minor pronunciation/text variations, but no difference in basic meaning.

So, if someone asks “Who wrote Chattari Mangalam?”, the accurate Jain answer is:

> It is a traditional Jain mangal‑sutra from the early Agamic tradition; > its specific human author is not known and is not attributed to any single ācārya.

You can read the full text and simple meaning here