Nepal is officially Federal Democratic Republic of Nepal, landlocked country in South Asia and located mainly in the Himalayas. With an estimated population of 29.1 million, it is 48th largest country by population and 93rd largest country by area. It borders China in the north and India in the south, east and west while Bangladesh is located within only 27 km (17 miles) of its south-eastern tip and Bhutan is separated from it by the Indian state of Sikkim. Nepal has a diverse geography, including fertile plains, subalpine forested hills, and eight of the world's ten tallest mountains, including Mount Everest, the highest point on Earth. Kathmandu is the capital and the largest city. Nepal is a multi-ethnic country with Nepali as the official language.
In the middle of the first millennium BCE, Gautama Buddha, the founder of Buddhism, was born in Lumbini in southern Nepal. The centrally located Kathmandu Valley is intertwined with the culture of Indo-Aryans, and was the seat of the prosperous Newar confederacy known as Nepal Mandala. By the 18th century, the Gorkha Kingdom achieved the unification of Nepal. The Shah dynasty established the Kingdom of Nepal and later formed an alliance with the British Empire, under its Rajput Rana dynasty of premiers. The country was never colonized but served as a buffer state between Imperial China and British India. Parliamentary democracy was introduced in 1951, but was twice suspended by Nepalese monarchs, in 1960 and 2005. The Nepalese Civil War in the 1990s and early 2000s resulted in the proclamation of a secular republic in 2008, ending the world's last Hindu monarchy. The Constitution of Nepal, adopted in 2015, affirms Nepal as a secular federal parliamentary republic divided into seven provinces.