Tetractys Zodiac And Six-Pointed Star

The Tetractys shows the numbers 1, 2, 3, 4 as dots, each in a separate line.

The Tetractys is connected to the six-pointed Star, like we see here in the following drawing.

It is also connected to the zodiac as Clare Martin showed in her book "Mapping the Psyche", London, 2005:

Pythagoras devised the Tetractys as a mathematical model that shows how numbers describe the nature of the universe as well as the nature of any system, including the human being…

These numbers are not simply quantitative, but are also archetypes of number, with ‘oneness’, ‘twoness’, ‘threeness’ and ‘fourness’ being understood as wholes or unities in themselves, each with their own qualitative meaning.

1-     There is one zodiac

2-     The signs are active or passive (Scorpio is passive)

3-     The signs are cardinal, fixed or mutable (Scorpio is fixed)

4-     Each sign belongs to one of the elements: fire, earth, air, water (Scorpio is water)

Gregorian calendar

Scorpio sign appears on a 1982 German Zodiac signs stamp issued to mark four hundred years of the Gregorian calendar. 

Copyright: Dobush From Kfar Aza, Israel

2004 Russian Postage Stamp

Scorpio name sign glyph and constellation appear on a Russian stamp issued on the 21st of April 2004.

Cleveland Museum of Art

Scorpio sign statue at Cleveland Museum of Art picture is courtesy of stu_spivack from Flickr. 

Toulouse

Scorpio sign in a modern design

Picture is courtesy of “iko” from Flickr who took it in Toulouse, France

Zodiac in French

 Les signes du Zodiaque

 Aries Le Bélier

Taurus- Le Taureau

Gemini Les Gémeaux

Cancer- L’Écrevisse

Leo- Lion

Virgo- La Vierge

Libra- La Balance

Scorpio- le Scorpion

Sagittarius- Le Sagittaire

Capricorn- Le Capricorne

Aquarius- Le Verseau

Pisces- Les Poissons

Wishing Bridge, Jaffa, Israel

Nearby there's a big sign notifying that an ancient legend has it that if you touch your Zodiac sign and make a wish while looking at the sea - your wish will come true. To me it looks like a modern legend invented to attract tourists - why didn't they mention the source of the legend?

Picture is courtesy of "binarydreams" from Flickr

Mithraic Bas-relief from Modena

Scorpio with the other signs of the zodiac appears on a Bas-relief, which is kept  now in the Estense Museum in Modena, Italy.

From: The Mysteries Of Mithra by Franz Cumont, Chicago, 1903 p. 223

At Housesteads on Hadrian's Wall, Britain,  there was found a A bronze image of Mithras surrounded by the Twelve Signs of the Zodiac. This is the earliest artifact showing the Signs of the Zodiac in the north-west provinces of the Roman Empire.

Mithraism was brought to Rome by Roman soldiers from Persia in the first century C.E.