Online Store › Cahokia Mounds Image 1 of 1 Cahokia Mounds from $22.50 ‘America's First City’. By William Iseminger. Center of the Mississippian culture, parent of Aztalan. Are you a Member?: Select Are you a Member? Yes - Member Not a Member Quantity: Add To Cart Added! ‘America's First City’. By William Iseminger. Center of the Mississippian culture, parent of Aztalan. If you are a paid-up or Lifetime member: $18 + S+H (10% discount). Non-member: $20 + S+H