| Obverse description | Representation of Europe as a vessel sailing under the twelve stars of the Union. On the left side the year of issue, on the right the monogram `RI`, in the lower center the name of the author. |
| Obverse script | Latin |
| Obverse lettering | 2005 RI
E.L. FRAPICCINI (Translation: (RI) = Italian Republic) |
| Reverse description | One of the building of the famous Finnish architect Alvar Aalto: the main Auditorium of Helsinki University of Technology in Otaniemi, Espoo. Below the value and the mint mark. |
| Reverse script | Latin |
| Reverse lettering | EUROPA DELLE ARTI R A. AALTO 20 EURO |
| Edge | Reeded |
| Mint | R Rome, Italy (476-date) |
| Mintage | 2005 R - Proof - 2 800 |
| Catalog ID | 2494148610 |
| Comments |