Naqshbandiyya Khalidiyya, or Khalidiyya, is the title of a branch of the Naqshbandiyya Sufi lineage, from the time of Khalid al-Baghdadi until the time of Shaykh Ismail ash-Shirwani. Naqshbandi ( Naqshbandiyya) is one of the major Tasawwuf orders ( Tariqa) of Islam. Sufism ( تصوّف - taṣawwuf, Persian: صوفیگری sufigari, Turkish: tasavvuf, Urdu: تصوف Khalid al-Baghdadi was a Naqshbandi Sufi Sheikh and founder of the Khalidi branch of the Naqshbandi order
Moshe Gammer in Muslim Resistance to the Tsar said that the "Naqshbandiyya Khalidiyya, [is] a branch of the Naqshbandi order named after Shaykh Diya al-Din Khalid al-Shahrazuri (Khalid al-Baghdadi)". Naqshbandi ( Naqshbandiyya) is one of the major Tasawwuf orders ( Tariqa) of Islam.