Despite oft-repeated doubts as to its stability, the Eiffel Tower celebrated its centenary in 1989 after a general overhaul lasting eight years. In 1932 it lost its title as the world's highest man- made structure to the Empire State Building in New York (a title now held by Burj Dubai, expect to rise to 2,684 ft upon completion), but is still visited by almost six million people a year. The Eiffel Tower has long been, and still is, the great landmark of Paris.
Sunday, May 22, 2011
A windmill is a machine which converts the energy of wind into rotational energy by means of vanes called sails or blades. Originally windmills were developed for milling grain for food production. In the course of history the windmill was adapted to many other industrial uses. An important application was to pump water. Windmills used for generating electricity are commonly known as wind turbines.
Monday, April 25, 2011
The castle is a mix of styles from Gothic to Renaissance. Prince Elector Ruprecht III (1398–1410) erected the first building in the inner courtyard as a royal residence. The building was divided into a ground floor made of stone and framework upper levels. Another royal building is located opposite the Ruprecht Building: the Fountain Hall. Prince Elector Philipp (1476–1508) is said to have arranged the transfer of the hall's columns from a decayed palace of Charlemagne from Ingelheim to Heidelberg.
Sunday, April 10, 2011
The oldest part of the Orloj, the mechanical clock and astronomical dial, dates back to 1410 when it was made by clockmaker Mikuláš of Kadaňand Jan Šindel, the latter a professor of mathematics and astronomy at Charles University.
Later, presumably around 1490, the calendar dial was added and clock facade decorated with gothic sculptures.