Which are the top 10 oldest casinos still in operation today?

Here are the top 10 oldest casinos still in operation today:

1. Casino di Venezia (Venice, Italy) – Established in 1638
2. Casino Wiesbaden (Wiesbaden, Germany) – Established in 1771
3. Casino de Spa (Spa, Belgium) – Established in 1763
4. Casino Baden-Baden (Baden-Baden, Germany) – Established in 1824
5. Casino de Monte-Carlo (Monte Carlo, Monaco) – Established in 1863
6. Casino Bad Homburg (Bad Homburg, Germany) – Established in 1841
7. Casino Kursaal (Interlaken, Switzerland) – Established in 1859
8. Casino Estoril (Estoril, Portugal) – Established in 1916
9. Casino de Namur (Namur, Belgium) – Established in 1858
10. Casino Salzburg (Salzburg, Austria) – Established in 1934

Please note that the date of establishment may vary depending on different sources and definitions of what constitutes a casino.