Bangkok: Most Thais have never seen anything like it.

Pageantry that has barely changed since the 14th century marked the end of 12 months mourning the death of King Bhumibol Adulyadej, the beloved "father of all Thais", who was considered by many to be a demigod.

A spectacular 50.28-metre tall pyre representing Mount Meru, which in Thai-Hindu cosmology is thought be the centre of the universe and the connection between the human realm and the divine, is at the centre of five days of rituals surrounding the king's cremation on Thursday night.

Royal artists took 10 months to meticulously design every carving, flick of paint brush and wooden strut, passing on the artisanship Thais regard as their most elaborate.