Kathmandu is the capital city of the Federal Democratic Republic of Nepal. It is the largest metropolis in Nepal, with a population of 1.5 million in the city proper, and 3 million in its urban agglomeration across the Kathmandu Valley, which includes the towns of Lalitpur, Kirtipur, Madhyapur Thimi, Bhaktapur making the total population to roughly 5 million people and the municipalities across Kathmandu valley. Kathmandu is also the largest metropolis in the Himalayan hill region.
The city stands at an elevation of approximately 1,400 metres above sea level in the bowl-shaped Kathmandu Valley of central Nepal. The valley is historically termed as "Nepal Mandala" and has been the home of Newar culture, a cosmopolitan urban civilization in the Himalayan foothills. The city was the royal capital of the Kingdom of Nepal and hosts palaces, mansions and gardens of the Nepalese aristocracy. It has been home to the headquarters of the South Asian Association for Regional Cooperation since 1985. Today, it is the seat of government of the Nepalese republic established in 2008; and is part of the province 3 in Nepalese administrative geography.