Princess Helen of Greece and Denmark was born on May 2, 1896, in Athens, Greece. She was the daughter of King Constantine I of Greece and Queen Sophia of Greece. Helen became a prominent figure in European royalty through her marriage to Prince Christopher of Greece and Denmark in 1920. Throughout her life, Princess Helen was involved in various charitable activities and supported numerous causes. She was known for her dedication to her family and her role in the royal family, which included connections to other royal houses across Europe, such as the House of Schleswig-Holstein-Sonderburg-Glücksburg.