Catherine the Great

In anticipation of the most talked-about nuptials of the year, Savannah Guthrie and Hoda Kotb of NBC's "TODAY" take viewers to London to reveal exclusive insights on the wedding of Prince Harry and Meghan Markle.

An inside look into the lives of Meghan Markle and Prince Harry straight from experts, socialites and friends intimately connected with the House of Windsor.

The ancients hid the secrets of their incredible knowledge of astronomy in their temples and palaces, built to align with the sun, on the same day, all over the world. Revealing our species' obsession with the sun, across thousands of years and every continent, this is architectural magic on a cosmic scale.

Ancient Korea, 1506. The tyrannical King Yeonsan-gun of Joseon is overthrown by his half-brother Jung-jong, whose reign begins with a blood bath. Over the years, traitors plot against him, sinking the kingdom into chaos. In 1528, frightened rumors come to royal palace, regarding a mysterious creature, known as Monstrum by the peasants.

This documentary charts Harry's journey through important turning points in his life - four other royal weddings and the death of his mother, Diana, Princess of Wales. Along the way it touches on the prince's active service as a soldier in Afghanistan and his international charity work.