The Emperor Was delighted with Tulsidas and offered the Hanuman temple by having an Islamic crescent Moon finial which adorns the temple spire. It is usually claimed that due to crescent moon symbol around the spire, the temple wasn't wrecked from the Muslim rulers who invaded India at many situations. https://hanumanmandiradelaide.com.au/mahashivratri-celebration-at-hanuman-mandir-south-australia-a-night-of-divine-awakening/