Obverse. Photo © Austrian Mint
  • 25 Euro 2011, KM# 3204, Austria, Silver Niobium Coin, Robotics
  • 25 Euro 2011, KM# 3204, Austria, Silver Niobium Coin, Robotics
  • 25 Euro 2011, KM# 3204, Austria, Silver Niobium Coin, Robotics, Box with a certificate of authenticity

The 25 euro coin struck by the Austrian Mint in 2011, entitled "Robotics", features robotics, a field concerning electronics and mechanics, as its main motif. The niobium center is red in color, a reference to Mars, which is used as the motif for the reverse of the coin.

Each coin contains 9 g of 900 Fine Silver in its outer ring and 6.5 g of 998 pure niobium. Niobium was chosen for the core due to its workability as a coinage metal and its low reactivity (which prevents its corroding where it comes in contact with the silver ring). Niobium’s larger application is in the aerospace industry, making it a thematic fit with the series, whose designs have focused on achievements in science and engineering. Each piece is encapsulated, boxed and comes complete with a numbered certificate guaranteeing its authenticity.


Symbolizing the fusion between electronics and mechanics, fundamental in robotics, the intricate illustrations on the obverse of this cutting-edge piece feature mechanical cogs and digital binary coding. In its center a robotic version of Leonardo da Vinci’s Vitruvian Man typifies ideal human proportions in the place of a human being, set against the mars-red background of the niobium core. This color is a reference to the coin’s reverse.

The Vitruvian Man is a drawing by Leonardo da Vinci around 1490. The drawing, which is in pen and ink on paper, depicts a man in two superimposed positions with his arms and legs apart and inscribed in a circle and square. The drawing is based on the correlations of ideal human proportions with geometry described by the ancient Roman architect Vitruvius. He described the human figure as being the principal source of proportion among the classical orders of architecture. Leonardo's drawing is traditionally named in honor of the architect.

Engraver: Helmut Andexlinger



Depicts a mountainous Martian landscape with a European Space Agency robot exploring the red planet as a star-filled sky and planet Earth shine down from the coin’s silver edge.

ExoMars (Exobiology on Mars) is a two-part astrobiology project to search for evidence of life on Mars, a joint mission of the European Space Agency (ESA) and the Russian space agency Roscosmos. The first part, launched in 2016, placed a trace gas research and communication satellite into Mars orbit and released a stationary experimental lander (which crashed). The second part is planned to launch in 2020, and to land a rover on the surface, supporting a science mission that is expected to last into 2022 or beyond.

Featured to the right of the rover are grid coordinates ranging from "1150" to "1400" and raising by increments of 50. A depiction of the earth focused on Europe and northern Africa is displayed in the ring at the bottom left periphery. Printed along the bottom rim of the coin is the German text "MARS-ROBOTER", which translates to English as "Mars robot".

Engraver: Thomas Pesendorfer


Type Commemorative Issue (Non-circulating)
Material Niobium
Weight 16.5 g
Diameter 34 mm
Thickness 2.55 mm
Shape round
Alignment Medal
Austrian Mint

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