The installation of the Yang di-Pertuan Agong is a ceremony that formally marks the beginning of the reign of the Yang di-Pertuan Agong as the Malaysian head of state.
Since 1957, the rite has been a part of Malaysian history, with 13 such ceremonies held, first at the Tunku Abdul Rahman Hall at Jalan Ampang, Kuala Lumpur, and in the National Palace from 1980 onwards. The old National Palace at Jalan Istana hosted its final installation in 2007, and in 2012, the present National Palace at Jalan Tuanku Abdul Halim held its first installation.
The ceremony is a hybrid of ceremonies found in eight of nine royal states in Malaysia, which all have one similarity: all do not use a crown. Instead, a special headdress known as Tengkolok Diraja (Royal Headdress) is used, except in Johor and Selangor where the Sultan is crowned (as Johor State Government is heavily British-influenced).[citation needed]