Unfortunately most of these pagan temples were destroyed when Christianity became the state religion of the country. The only pagan temple that withstood the historical changes is the Garni temple (1st century B.C.)
Archeologists have found many golden coins, monuments, and statues, etc. Despite the fact that the country adopted Christianity some of the Pagan traditions were so strong that Armenian Apostolic Christian church incorporated those into some Christian holidays.
In the mountains of nowadays Armenia (in the south, close to town Goris), the first observatory Karahoonj (kar-means stone, hoonj-means voice, sound) was created. It has a history of 7.500 years and scientists believe, that there is a tight connection between the observatory in Armenia and Stonehenge in Britain, since the latter is much younger (about 4000 years) and the name itself is similar to the Armenian name and the second half of the name (hange) does not really mean anything in English.
During the epoch of Tigran II the Great Hellenistic culture spread throughout Armenia. It influenced architecture, literature, music, theater. Though the theater was not something new for Armenians, it was a primitive folk theater, where stories taken from the everyday life of the people were being performed. Hellenistic theater introduced various generes: tragedies and comedies of Greek authors, dramas, sometimes Greek actors performed for the Armenian kings and noblemen. Armenians also began to write dramas. There were created not only dramatic, but also many historical and philosophical works. All the literature of that period was in Greek language, since there was no Armenian alphabet at that time. Many Armenian princes were educated in Greece. At that time the influence of the Roman culture increased.
Armenian Christian culture brought with her new types and styles of music, literature and architecture. Theater was prohibited. Literature began to develop in Christian way: the main themes were the problems of God and human being. Many beautiful churches were built, some of them have survived till our days. There was a great need for the Armenian alphabet. In 405 A.D. Mesrop Mashtots, the great Armenian scholar, created the Armenian alphabet. Many Armenian scholars of that time wrote prominent books on History of the country, due to which we are able to learn both about the contemporary and ancient history of the country before our era. Movses Khorenatsi, famous Armenian historian wrote "History of Armenia till Our Days" (middle of 5th century). Generally, it is possible to say that the 5th century became the "Golden century" for Armenian Christian culture.
One of the most typical works of art in Armenia throughout the history have been the khachkars (cross-stones).
Science also bloomed in the 5th century, some of the fields that advanced were medicine, mathematics and astronomy. In the sphere of medicine there were created such works, which were used by Ibn-Sina, the great Arab scientist. The most prominent doctor was Mkhitar Heratsi, whose recipes are still used in folk medicine. Mathematics, especially geometry, was developed in works of Anania Shirakatsi (6th century).
Significant changes took place in education, too: in the pagan times education was only for princes and noblemen after adoption of Christianity all the people got access to education and literacy. Various community schools were established adjacent to different churches.
Arab and Turk occupations partly destroyed the historical and cultural monuments in Armenia. After the 10th century architecture developed significantly: New styles in architecture were promoted and many churches, monuments, were built. The epical poem "Sasuntsi David" was written back then. It tells about the fight of Armenian people against the Arab invaders. Grigor Narekatsi wrote his famous book of "Lamentations", it had such powerful influence on the people. It was believed that it had curing power. Democratic and progressive ideas about the equal rights of men and women were promoted at that time. 10th century can, indeed be called the era of "Reneissance" in Armenia.
In the 18-19th centuries the realistic movement in literature was developed. Writers were depicting life of ordinary people in their works. There were written also some political works, comedies. At the beginning of the 20th century the lyrics genre developed in literature. Literature developed in Diaspora (Armenian communities all over the world) as well (William Saroyan, Tekeian, etc).
After Armenia become a sovereign state in 1990, it got access to the experience of international scientific potential, and established new links of collaboration with many international counterparts.

Authors:
Sergey E. Harutyunyan, Hakob Hakobian
References: K. Zhamkochian "History and Culture of Armenia", Yerevan, 1987