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The Sun in Tetrapylons

A Report on Discovering the Relationship between Tetrapylons, Time and Variation in the Declination of the Sun

The Sun in TetrapylonsReza Moradi Ghiasabadi is a well-known Iranian researcher with a novel insight into History and Archaeology. After becoming familiar with his works, I asked him to let me translate the report of one of his research projects explaining his theory on the functionality of the Persian tetrapylons as solar structures. This theory has been confirmed by some experts and many evidences, validating it, have been found. The first part of this book is the translation from the last Persian edition of the book The Persian Tetrapylons published in 2010. The second part of this book is published herein for the first time except Chapter 13, Heidentor Tetrapylon, which has been published as a paper in Journal of Persia Digest (۲۰۱۲).

Ghiasabadi begins The Persian Tetrapylons with an old poem: “That building on the hillside is a place for time and time measurement.” This poem is from Shahnameh, authored by Ferdowsi, who is the greatest Persian epic poet in the tenth century AD. Ferdowsi narrates the ancient historical-storied events of Iranian people in Shahnameh. Ferdowsi quotes the mentioned poem from Zal, who is a Persian mythological character whose functions relate to the time and Zurvan. In fact, Ghiasabadi starts his book with a thousand-year-old poem which describes a building on a hillside with calendrical functionality, so this poem can be an allegory of a tetrapylon. […]

What is Iran

Some questions are simple superficially but complicated fundamentally. One of the most complicated issues in historical studies is clarifying the meanings of countries’ proper names. There are three reasons for this complexity: first, differences in phonetics and pronunciation of names in different languages; second, the evolution of names in written and oral language; and third (but most important), changes in the subject that a name denotes and use of one name for another important thing.

The names Iran and Pars/ Persia have an interesting history full of changes in pronunciation, meaning, and application. Here we rely upon the available resources to track the evolutionary course of these names and find an answer to the question, “What is Iran?” […]

Recognizing Solar Relations at Heidentor Tetrapylon in Austria

A European tetrapylon of the Roman Empire from the middle of the 4th century AD has been identified as the first tetrapylon used for calendric purposes in Europe, and some other sites are being studied. I believe that just as the study of the Persian tetrapylons led to the finding related to this Roman tetrapylon, special features of Roman tetrapylons will also help to reveal unexplored aspects of Persian tetrapylons. This tetrapylon is located in eastern Austria and is called Heidentor (Pagan Gate or Heathens’ Gate). The name Heidentor is an evolved form of Heydnisch Tor, which means “Pagan Gate” in German. Having been built so early in the Christian Era, it is believed to have been constructed by pagan non-Christians (probably followers of Mitra). […]

La sauvegarde de la chronologie Iranienne

Tout au long de leur histoire, les Iraniens ont accordé une grande importance aux phénomènes naturels pour l’élaboration de leur calendrier. De l’Antiquité à nos jours, de nombreux systèmes chronologiques ont été successivement mis en place. Le système chronologique actuel de l’Iran (qui est un calendrier solaire) peut être considéré comme l’un des calendriers le plus exact du monde en lien étroit avec les cycles de la nature. En approfondissant les divers calendriers persans, une divergence se fait jour concernant leur premier jour ainsi que le nombre de jours de chaque mois. A titre d’exemple, là où la chronologie solaire est considérée comme la mesure de base, le premier jour est différent pour chacun des calendriers : calendrier Kouhdashti : le 4 Farvardin (23 mars), calendrier Tabari : le 2 Mordâd (23 juillet), calendrier Deylami : le 17 Mordâd (7 août), calendrier saisonnier de Kâshân et Natanz [1] : le 1 Esfand (19 février), etc. Néanmoins, l’important est que le titre et l’ordre des jours et des mois soient plus ou moins similaires dans tous ces calendriers. En outre, dans le calendrier persan chaque jour a son nom, 1er jour du mois s’appelle Hormoz, le 2ème jour Bahman, le 3ème jour Ordibehesht [2], même s’ils ne sont plus utilisés de nos jours. […]

Winged Globe

Everybody knows the ancient Winged Globe (Winged Disk). In it’s common kind there is a globe with two wings at it’s both sides and a god in the middle of that which sometime has a ring or flower in her hand and a star figure on top of her head .Winged Globe chart had been seen from ninth century BC at all western parts of Persian lands. But her different main parts like Globe, Wing, god had their own usage at more ancient times. Globe’s figure or medial tassel gets vision from sun which the origin of many of the ancient believes and we can see its effect on today’s praying. We can see symbol of sun without globe/ disk or anything else is so many charts which the most typical one is chart of quintet Lulluian at Sar-e Pol-e Zahab. […]

Farr-e Kayani

From long times ago and between different nations and religious there was a tradition in their paintings. They draw a beams of light around the heads of their holly men and kings .In Iranian (Persian) believes and writings it is called Farr lightness from god is called Farr that whoever can have it has the capacity of being leadership .Sa¢ alebi called it “God’s lucky lights”. In Avesta there is special part for describing and praying Farr. «Zamyad yasht/ kayan yasht/ Khvarena yasht» these are old parts of Avesta “we pray Mazda’s Farr which is powerful, bright, adroit, deft, pious which is superior from all creatures”(Zamyad yasht, Part 9). Zamyad yasht`s alludes show that these parts are composed in west mountains of Iran (Persia) specially «Zabolestan/ Sistan/ Nimrouz». In Zamyad yasht more than praying Farr so many mountains of Iran has been alluded. […]

Ashi: Celestial Goddess of Ancient Persia

Cassiopeia/ Cassiopee constellation is one of the constellations that are near Pole Star and can be seen at all night at northern celestial. In contrast with Pole Star Cassiopeia is proportion of Ursa Minors and Ursa Major these two are always rolling at tow sides of Pole Star. Cassiopeia’s second and third groups of stars are more than other constellations so as a result it is one of the brightest constellations of celestial. Some of the stars of this constellation used to be more shinning and some of them had supernovas. One of these supernovas was Brahe that around 400 years ago suddenly it became so shiny that it could be seen even at daylights. Today knowledge has shown that Kappa star of Cassiopeia was the shiniest star of whole celestial but its exact time hasn’t been defined yet .Powerful radiation fountains which are the result of Cosmology exploitations at Cassiopeia constellation has been founded. […]

A fight between “Teshtar” and “Apoush” in sky

About 4000 years ago, Persian had too low rain and whether at that time so hot as a result some beliefs had grown up at ancient Persia (Iran). One of beliefs says “Teshtar” (Sirius) is responsible for raining and its opposite is “Apoush” (Cabalatrab/ Antares). In “Teshtar Yasht” (a part of Avesta) these two stars fight with each other (this is one of the oldest plays of mankind history). At this play some times Teshtar wins and sometimes Apoush. Here is a question what is the reason of growing such beliefs? For finding its answer we should be familiar with their annual rising and setting. […]

Mithra And it’s Association with Archeological Polar Star

Name of Mithra has been streamer at Persian (Iranian) culture and literature and by passing time have made a deep association with “Mehrizad” God of Kindness, Sun and Friendship. But before it’s activities get so vary it’s most popular character was it endless brightness. Sources that we have show that this archeological star was the source of beliefs about Mithra. And for ancients who had a favor on cosmology a star hat never sets was very important and interesting. […]

Weeks in Ancient Persia

Week and weekdays have important application in calendar systems both solar and lunar. Even though world’s different calendars vary in many calculation details and other features, the method of reckoning based on seven-day week is the same in all of them. We know that number of days in a month or in a year is different in each calendar, even in the same calendar months different number of days (some months have 30 days some 31), and we also know that during the history there have been reforms to change this. […]

Gâhanbâr Calendar The Oldest Calendar that has Found in Persia

In Old Persian (Iranian) epigones there are six yearly celebrations that are called “Gâhanbâr celebrations”. Name and time of these celebrations has been recorded differently that shows their long history. These celebrations they start at summer. In order are these: “Midyu- shem” that means middle of summer. “Patyah- shahim” means end of summer. “Ayâthrema” coldness starting, middle of fall. “Mid- yârem” means middle of year, end of fall (year starts in summer). “Hamaspat- madam” that means equality between day and night or equality between coldness and warmness, end of winter, spring equinox. “Midyu- zarem” means middle of green season or spring. […]


In Iranian (Persian) believes star or as it’s called today planet Anahid/ Anahita/ Nahid (Venus) is flowing water’s star and so Nahid`s temples have been made near rivers and water fountains. And also there is another character which as a result waters and its fountains and aqueducts belonged to her and she was supporter of them. The reason why in Iranian traditional believes water fountains were symbols of Anahid`s place and men can not go there is based on this believe. […]

Aryans’ Immigration in Relation to the Ancient Seas and the Weather of Iran

The overwhelming majority of historical sources regard the people of present Persia (Iran) descendants of Aryans who are thought to have migrated from some far northern land towards south including the present land of Persia, destroyed native people and civilizations and replaced them. The date of this great migration is speculated to be sometimes between 3000 to 5000 years ago. Similarly, speculations on the point of origin of this great history-making shift includes a vast area from west, north and center of Europe to east of Asia, Baltic Sea, Scandinavian peninsula, north plains of central Asia and Caucasus, Siberia and even the north pole. This very disagreement and lack of unquestionable evidences on the exact geographical homeland of these Aryans point to the soundlessness of such speculations. Most of contemporary historical texts end the account of the land of origin and this great migration with a few short obscure and inexact statements without giving any sound reasons for such an important move. They usually suffice to present a map with a few large arrows drawn from Siberia to Caspian Sea and central plains of Persia. […]

Аревнейшая Солнечная Обсерватория в Иране

Зaниси “Aвесты” и других текстов имеют связаны с древней энохой ахеменидов, и в каждой из ныхскрыть тайны. Накше Рустам – это название местности в провинции Фарс в шести килуметрах к северу от “Тахте Джамшида”. В этом месте в сердцевине горы Севанда высечены четыре гробницы, относящиеся к царям ахеменидов. В нижней ее части имеются несколько разукрашеных камней, сохранившихся со времен сасанидов и даже со времен эламской государственности. Именно из- за наличия этих изображений даная местность называется Накше Рустам. На некотором расстоянии от горы расположено строение солнечной обсерватории Накше Рустам. Оно представляет собой иостройку, которая была воздвигнута в приод ахеменидов. […]

Zoroaster’s Kaba, in Naqsh-e Rustam

An Iranian archaeologist has rejected the theory describing the Achaemenid era monument Zoroaster’s Kaba as an ancient government archive, saying that the monument is the world’s most unique calendrical and astronomical building. “At the end of Shahrivar (the sixth month of the Iranian calendar, August 23-September 22) we can determine exactly the day of the month by the light shed by the sun on Zoroaster’s Kaba. It has been used for daily needs, determining the time of cultivating crops, and collecting taxes,” Reza Moradi Ghiasabadi explained. […]

Nimrouz: The Middle of Ancient World

Nimrouz land (Sistan/ Zarang/ Zavolestan) has a deep and long bond with Persian (Iranian) astronomy and calendar. It’s different names come from its astronomical applications. The name of “Zabol/ Zavol” had relation with sun reaching to zenith and it’s measurement as the origin for day and night and the word “Mezvaleh” which means sun index came from the same root. It seems that the word “Zarang” (in Achaemenid cuneiform script: “Zaraka”) has a relation with “halt” and “time” and the most important of all, the word “Nimrouz” roots from the ancient belief and wisdom that the “Nimrouzan” line or the meridian passes through this region. […]

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