The second millennium of the Anno Domini or Common Era was a millennium spanning the years 1001 to 2000. It began on January 1, 1001 (MI) and ended on December 31, 2000 (MM),.
A personal union is a combination of two or more monarchical states that have the same monarch while their boundaries, laws, and interests remain distinct. A real union, by contrast, involves the constituent states being to some extent interlinked, such as by sharing some limited governmental institutions. Unlike a personal union, in a federation or a unitary state, a central (federal) government spanning all member states exists, with the degree of self-governance distinguishing the two. The ruler in a personal union does not need to be a hereditary monarch.
The Habsburg monarchy, also known as Habsburg Empire, or Habsburg Realm, was the collection of empires, kingdoms, duchies, counties and other polities that were ruled by the House of Habsburg. From the 18th century it is also referred to as the Austrian monarchy or the Danubian monarchy.
A colonial empire is a collective of territories, either contiguous with the imperial center or located overseas, settled by the population of a certain state and governed by that state.
A naval ensign is an ensign used by naval ships of various countries to denote their nationality. It can be the same or different from a country's civil ensign or state ensign.
This list contains all European emperors, kings and regent princes and their consorts as well as well-known crown princes since the Middle Ages, whereas the lists are starting with either the beginning of the monarchy or with a change of the dynasty. In addition, it contains the still-existing principalities of Monaco and Liechtenstein and the Grand-Duchy of Luxembourg.
The history of the Caucasus region may be divided by geography into the history of the North Caucasus (Ciscaucasia), historically in the sphere of influence of Scythia and of Southern Russia, and that of the South Caucasus in the sphere of influence of Persia, Anatolia, and Assyria.
Archaeology in India is mainly done under the supervision of the Archaeological Survey of India.