Dzong architecture is a distinctive type of fortress architecture found in the present and former Buddhist kingdoms of the Himalayas; Bhutan and Tibet. The architecture is massive in style with towering exterior walls surrounding a complex of courtyards, temples, administrative offices, and monks' accommodation. The Dzong’s of Jakar, Trongsa, Paro and Punaka are shown on this card sent to me by Shashi.
The details of Paro and Trongsa may be read from my posts on 16th and 28th November 2011. Jakar is a town in the central-eastern region of Bhutan. It is the district capital (dzongkhag thromde) of Bumthang District and the location of Jakar Dzong, the regional dzong fortress. The name Jakar roughly translates as "white bird" in reference to its foundation myth, according to which a roosting white bird signaled the proper and auspicious location to found a monastery around 1549. According to the Jakar foundation myth, a roosting white bird signaled the proper and auspicious location to found a monastery around 1549. The settlement thus earned the monicker Jakar, meaning "white bird." Punakha is the administrative centre of Punakha dzongkhag, one of the 20 districts of Bhutan. Punakha was the capital of Bhutan and the seat of government until 1955, when the capital was moved to Thimphu. It is about 72 km away from Thimphu and it takes about 3 hours by car from the capital Thimphu. Unlike Thimphu it is quite warm in winter and hot in summer. It is located at an elevation of 1,200 metres above sea level and rice is grown as the main crop along the river valleys of two main rivers of Bhutan, the Pho Chu and Mo Chu. Dzongkha is widely spoken in this district. Pungthang Dewachen Phodrang (Palace of Great Happiness) or Punakha Dzong was constructed by Tuebi Zaow Balip under the great command of Zhabdrung Ngawang Namgyal in 1637 and believed to have been completed in two years of time period. It is also the country's most beautiful Dzong.It is the winter residence of Bhutan's Central Monastic Body led by HH the Je Khenpo. The Dzong houses the most sacred relics of the Southern Drukpa Kagyu school including the Rangjung Kasarpani, and the sacred remains of Zhabdrung Ngawang Namgyal and Terton Padma Lingpa. In 1907, Punakha Dzong was the site of the coronation of Ugyen Wangchuck as the first King of Bhutan. Three years later, a treaty was signed at Punankha whereby the British agreed not to interfere in Bhutanese internal affairs and Bhutan allowed Britain to direct its foreign affairs. In 1987, the dzong was partially destroyed by fire.