Well, "The Mughal Empire" was basically an extensive Muslim Kingdom under hereditary rulers centralized in the subcontinent of India between the 16th and 19th centuries.
Islam was essentially their religion until Akbar in 1582 CE, one of their main emperors instituted "The Dīn-i Ilāhī", which merged Islam with other religions such as Hinduism, Sikhism, Christianity, Jainism, Zoroastrianism plus other popular practices and believes reconciling their differences and taking the empire to its "Golden Ages".
"The Mughal Empire" declined due to civil wars and political corruption, which were stirred by abrupt new religious policies from late Mughal leaders causing revolts among their peoples.
Circumstances such as intolerance of non Muslim citizens, derived from later Mughal leaders, impaired the empire until it collapsed under the invasion of other kingdoms.
