2. The Chronology

Humans have always wanted to fix when facts have happened and to measure time. Years have been grouped into decades (10 years), in centuries (100 years), and eras, such as the Christian era which centers on the birth of Jesus Christ. Historical facts are divided into two spaces: before the birth of Christ (A.C.) and after His birth (D.C.).    

Usually, centuries are used to fixed historical dates. However, centuries do not correspond with the hundreds of years, but instead we must add one more. In the drawing above, we can see that the 1st century after Christ comprises from the 100 years to the 0; the 2nd century from the 100 years to the 199. The year 75 is within the 1st century; the year 250 is within the 3rd century; and the year 435 is within the 5th century.

   B) Indicate the century that the years below belong to

   3. Historical Sources ces

We can learn about History by studying its remains, in other words, remains that can be found in excavations (refer to the picture) or in museums. Moreover, the documents that humans have written can be found and studied in archives.

   4. The Auxiliary Sciences of History

These sciences are called as such because they are the sciences that help understand History. The most important ones are:    

- Chronology, which studies the way to measure time.    

- Paleography, which studies writing.    

- Numismatics, which studies coins.    

- Geography, which identifies the places where historical events have occurred.    

Archaeology, which studies the civilizations of prehistory and antiquity.

   C) Indicate whether it belongs to a historical source or an auxiliary science

   5. The Division of History

Historians have divided historical facts in Ages, separated by important events:    

1. Prehistory: from the origin of humankind on Earth until 3,000 A.C. when writing was invented.    

2. Antiquity: from 3,000 A.C. until 1476 D.C. with the fall of the Western Roman Empire.    

3. Middle Ages: from 476 D.C. until 1492, with the discovery of the Americas.    

4. Modern Ages: from 1492 until 1789 with the beginning of the French Revolution.    

Contemporary Age: from 1789 until today.

   D) To what Age do the following years belong to? Prehistory, Antiquity, Middle, Modern or Contemporary?

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