Blanca 'agnus dei' - Juan I Zamora

Juan I introduced the agnus dei blanca following the trauma of Aljubarrota in August 1385, where his catastrophic defeat by Portuguese and English forces effectively ended Castilian ambitions over Portugal. The religious imagery was almost certainly a deliberate political act — a king publicly humbled before God, recasting military failure as Christian piety. The Zamora mint was one of several authorized to strike this type, and output varied considerably between them.

AB#559 distinguishes the Zamora issue by mintmark. Dies for this denomination were shared, recut, and reassigned with enough frequency that attribution without the mark is unreliable.