What obverse does a euro coin have?
Could you elaborate on the design features found on the obverse, or front side, of a euro coin? I'm particularly interested in understanding the common elements and variations across different denominations. Does it typically feature a portrait or symbol representative of the issuing country? Are there any specific inscriptions or symbols that are common across all euro coins? Furthermore, does the design change depending on the country of origin, or is there a standardized design across the eurozone? Finally, what materials are typically used in the minting of euro coins, and how do they contribute to the overall appearance and durability of the coin?