Legend on 6 lines, the date below., Smooth flan., Graded PCGS XF45. Extremely rare. Coin struck during the siege of the city of Aire-sur-la-Lys, in the Artois region, in 1641 during the Franco-Spanish War. Taken at the end of July, on the 27th, by French troops, they were driven out by Spanish troops at the end of the same year. This coin, known as an ‘obsidionale’ (referring to its use in a besieged city), was minted in the name of Louis XIII during this short period when France controlled the city under the command of Marshal de La Meilleraye, until the beginning of December, surrendering on the 4th and leaving the city on the 7th. This 20 Sols module is undoubtedly the rarest denomination to date, with very few examples known to exist. This example has a beautiful grey patina. From the collection of Abbé Thilliez., LVD.XIII / REX PIVS / IVSTVS / INVICTVS / ARIAVNOA° / BIS OBSES. / 1641. PCGS certificate number: 45101281