The Commentary of Father Monserrate 2.3.5

2.3.5

At the four corners of the platform rise minarets, seven storeys high and octagonal in shape. Each storey of these minarets is five cubits high. They have windows directed towards the four winds, out of which the Musalman call to prayer is pronounced. Opposite this tomb is another great building of similar magnificence and costliness. In the tomb are buried three Mongol kings, and also the tutor of one of these kings. Each sepulchre is embellished with mosaics, bass-reliefs and inlaid work. In front of these sepulchres are preserved the gilded thrones of the three kings, these being regarded as the emblems of royal rank, just as we regard the crown and sceptre as such emblems.