The Emperor Was pleased with Tulsidas and introduced the Hanuman temple by having an Islamic crescent Moon finial which adorns the temple spire. Additionally it is claimed that as a result of crescent moon symbol within the spire, the temple wasn't ruined with the Muslim rulers who invaded India at https://directoryecho.com/listings1310369/the-smart-trick-of-shri-hanuman-mandir-that-nobody-is-discussing