Bhubaneswar, Jan. 14 -- Spain is on the brink of a historic moment as Princess Leonor, the 20-year-old daughter of King Felipe VI and Queen Letizia, is set to become the country's first Queen Regnant in over 150 years. Leonor will be the first female monarch to reign since Isabella II, who ruled Spain during the 19th century.

The Spanish crown has been held by the Bourbon dynasty since the early 1700s, following their victory over the Habsburgs in the War of the Spanish Succession. After decades of dictatorship under General Francisco Franco, the monarchy was restored in 1975 with King Juan Carlos I. Juan Carlos played a pivotal role in guiding Spain through its transition to democracy before abdicating in 2014 in favor of his son, Felip...