What is thyasaphu ? why is it taken as one of the sources of history?
Please help me guys

Thysaphu is a Thanka Art of Buddhist in clothes with beautiful design and symbols

All the paintings except No.10019 are Paubhas (a worshipful painted cloth, Thanka in Tibetan). Images 10019 is a Thyasaphu (foldbook), made of Nepalese paper smeared with Harital (yellow orpiment) depicted a sketch of Varahavatara (Incarnation of Vishnu as a Boar) in the full length of the paper. There are date, ranging 16th to 19th century in Paubhas. There is no date in the Thyasaphu sketch, which may be of 17th century.

Among nine images, seven are Buddhistic. Two images of Shani and Varahavatara could be said of Hindu. There are names inscribed in six among nine images. Three images are without names inscribed. They could be described as Mahakala(?),Yogini (?) and Varahav

1. artillery

2. jose san martin

3.their economies remained dependent on outside powers.

4. drafted new economies

5. democracies have replaced dictatorships