Like in reverence to your monkey god, Lord Hanuman, you'll find colonies of monkeys waiting around to greet you! The citizens of Delhi are, nonetheless, notably devoted to it. The first temple seems to have been built by Maharaja Jai Singh about the same time as being the Jantar Mantar, https://hindutemplesouthaustralia.politics.blog/2024/07/12/embracing-the-teachings-of-lord-shanidev-at-hanuman-mandir-adelaide/