The 1801 Mexico 8 Reales Pillar Dollar is a classic Spanish colonial silver coin, widely circulated across the Americas and beyond. Struck in Mexico City, it features the iconic “Pillars of Hercules” design on the reverse, symbolising Spain’s claim over the New World, with a banner reading PLUS ULTRA. The obverse bears the crowned monogram of King Charles IV. Weighing approximately 27 grams and measuring 38–40 mm in diameter, this coin was a trusted trade dollar, valued for its high silver content and global acceptance in commerce.