This is a 1999 Lincoln Cent with a Memorial Reverse, minted in Denver (indicated by the "D" mint mark). As part of the United States currency, this coin represents one cent or 0.01 USD. The diameter of the coin is approximately 19 millimeters, and it weighs 2.5 grams, comprised primarily of copper-plated zinc. The 1999 Lincoln Cent is notable for its high production numbers, with a remarkable mintage of 6,360,065,000 coins, making it a commonly circulated piece. The design features the iconic image of Abraham Lincoln on the obverse, while the reverse showcases the Lincoln Memorial, reflecting the historical significance and contributions of one of America's most revered presidents. Despite its widespread availability, the condition of individual coins will affect their market value. Generally, uncirculated or higher-grade examples may command a premium, while circulated examples remain mostly valued at their face value. Collectors may appreciate this specific year and mint mark as part of their Lincoln Cent collection or for its representation of U.S. coinage history.