10 Euros Johann Jakob Meyer

Johann Jakob Meyer was a Swiss-born philhellene who served as a military officer under the Greek revolutionary forces during the War of Independence in the 1820s, one of dozens of foreign volunteers whose contributions to the Greek cause have received uneven historical attention. Greece has issued philhellene-themed commemoratives intermittently across several decades, and Meyer sits toward the obscure end of that roster — significant enough for inclusion, rarely prominent enough for wider recognition outside specialist circles.