In clockwise position: 1. The Huniad Castle. 2. Peles Castle. 3. The Palace of Culture. 4. The Brâncoveanu Palace. Thanks to Anca.
Built in 1557, the Church of Santo Domingo was badly damaged in 1867, destroying its Gothic facade and leaving only its twin spires standing. The rebuilding of the church was done in the colonial style popular at the time, with the twin spires being incorporated into the design. Thanks to Moria.
The Putna Monastery is a Romanian Orthodox monastery. It was built and dedicated by Prince Stephen the Great. The monastery houses the tombs of Stephen and several family members. Construction began in 1466. Thanks to Anca.
The postcard is a photograph from Romanian artist Marius Vasiliu. [Here are some of his albums in Flickr]
The Imperial Castle in Poznań, popularly called Zamek, was constructed in 1910 for William II, German Emperor. Since its completion, the building has housed government offices of Germany and Poland (as of 1945). The castle was built in Neo-Romanesque style. Thanks to Kasia.
The Petronas Towers are twin skyscrapers in Kuala Lumpur, Malaysia. They were the talles buildings in the world from 1998 to 2004. They were designed by Argentine architect César Pelli.
La Giralda is a bell tower of the Seville Cathedral. It was built as a minaret during the Moorish period. It was registered as a UNESCO World Heritage Site in 1987. The tower is 104 meters high. Thanks to Alvaro.
Lübeck is a city in northern Germany and one of its major ports. The city has extensive Brick Gothic architecture and due to that it was listed by UNESCO as a World Heritage Site in 1987.