1 Sobirana - Joan Martí i Alanis Episcopal Co-Prince, Catalan

Andorra issued this coin in 1980 under a constitutional arrangement dating to 1278, when the Treaty of Pareage divided feudal sovereignty over the valleys between the Bishop of Urgell and the Count of Foix — a co-principality structure that survived intact into the modern era. Joan Martí i Alanis held the Episcopal Co-Prince role from 1971 until 2003, making him one of the longest-serving holders of that office in the arrangement's seven-century history.

The .918 fineness matches the traditional crown gold standard rather than the .999 bullion purity adopted by most late-twentieth-century sovereign gold issues — a deliberate archaism consistent with Andorra's approach to its earliest coinage program.