However , when his brother Chakna Dorje died in 1267 , this led to serious unrest as the important Drigung Monastery tried to push back the position of Sakya .
Rinchen Gyaltsen served for a time as chaplain ( lacho ) to Kublai Khan .
When Rinchen Gyaltsen 's brother Chakna Dorje died in 1267 , this led to serious unrest as the important Drigung Monastery tried to push back the position of Sakya .
Rinchen Gyaltsen served for a time as chaplain ( lacho ) to Kublai Khan .