Kathmandu
Malla era

The Licchavi era was followed by the Malla era. Rulers from Tirhut, upon being attacked by the Delhi Sultanate, fled north to the Kathmandu valley. They intermarried with Nepali royalty, and this led to the Malla era. The early years of the Malla era were turbulent, with raids and attacks from Khas and Turk Muslims. There was also a devastating earthquake which claimed the lives of a third of Kathmandu's population, including the king Abhaya Malla. These disasters led to the destruction of most of the architecture of the Licchavi era (such as Mangriha and Kailashkut Bhawan), and the loss of literature collected in various monasteries within the city. Despite the initial hardships, Kathmandu rose to prominence again and, during most of the Malla era, dominated the trade between India and Tibet. Nepali currency became the standard currency in trans-Himalayan trade.

During the later part of the Malla era, Kathmandu Valley comprised four fortified cities: Kantipur, Lalitpur, Bhaktapur, and Kirtipur. These served as the capitals of the Malla confederation of Nepal. These states competed with each other in the arts, architecture, esthetics, and trade, resulting in tremendous development. The kings of this period directly influenced or involved themselves in the construction of public buildings, squares, and temples, as well as the development of waterspouts, the institutionalisation of trusts (called guthis), the codification of laws, the writing of dramas, and the performance of plays in city squares. Evidence of an influx of ideas from India, Tibet, China, Persia, and Europe among other places can be found in a stone inscription from the time of king Pratap Malla. Books have been found from this era that describe their tantric tradition (e.g. Tantrakhyan), medicine (e.g. Haramekhala), religion (e.g. Mooldevshashidev), law, morals, and history. Amarkosh, a Sanskrit-Nepal Bhasa dictionary from 1381, was also found. Architecturally notable buildings from this era include Kathmandu Durbar Square, Patan Durbar Square, Bhaktapur Durbar Square, the former durbar of Kirtipur, Nyatapola, Kumbheshwar, the Krishna temple, and others.
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