The first Oktoberfest in Germany was held to celebrate what?

Here is the question :

THE FIRST OKTOBERFEST IN GERMANY WAS HELD TO CELEBRATE WHAT?

Here is the option for the question :

• Religious holiday
• End of a war
• Autumn equinox
• Royal wedding

The Answer:

And, the answer for the the question is :

Explanation:

[STC0017649]. The first Oktoberfest was held on October 12, 1810, to commemorate the union of King Louis I of Bavaria and Princess Therese von Sachsen-Hildburghausen as a royal couple. The first Oktoberfest was held for five days and culminated in a horse race. Since Oktoberfest became a yearly occasion, Munich is now home to enormous oak beer halls that can accommodate 6,000 people at once.