The last decides gave us new discoveries, which enriched our knowledge of ancient astronomy in Armenia. Besides different rock-cured images of constellations (fig.1, 2), the complex of platforms for astronomical observations was found near Yerevan, which we may call ancient observatory. (fig. 4, 5). 

The very first investigations of the complex of the Small Hill of Metsamor showed that it had an astronomical importance connected with the most primitive observations of the celestial bodies. 200 meters away from the principal Metsamor Hill there is an assemblage of rocks. Three of them have artificial platforms. The first one, of triangular in shape (fig. 3), has its smallest angle turned to the south. The bisector of that angle coincides with the north-to-south direction. On the eastern side of the triangle there is a rock-carved trapezium including four stellar figures (fig. 4). There are also different symbols, the meanings of which are still unknown to us. The second platform is located 2.5m above the first one. It is also triangular in shape and in line with the meridian.

The third platform differs from the two others. The stairs leading to it from the north to the south are cut in the rock (fig. 5) and are narrowing toward the top. A sign indicating the "north-south-east" direction (fig. 6) has been carved on the last step, which suggests that primitive astronomical, observations were carried out here in antiquity.

We have tried to find out the designation of the first platform bearing the figure of a trapezium and stellar symbols. By measuring the asimuth of the trapezium and comparing it with the asimuth of heavenly bodies rising in that same direction we were able to obtain an interesting result. The declination is found in the interval 21⁰-22⁰. The Hawkin’s list of stellar positions affords to established that the heavenly body which rose in that direction and could drew the attention of the inhabitants of Metsamor was probably Sirius, the inclination of which equal to the above-stated in the middle of the third millenium B.C. During the summer solstice it can be observed early in the morning. Thereby it can be assumed that the heavenly body which as observed and worshipped by the ancient inhabitants of Metsamor and the first emergent of which they could have related to the beginning of year was Sirius.

The complex found on the Small Hill of Metsamor leaves no doubt that since remote antiquity the inhabitants of the Armenian Highlands were acquainted with astronomy-a fact which also bears witness to the high level of their culture.