Queen Margrethe II, Europe's longest-reigning monarch, announces abdication after 52 years, passing the throne to son, Crown Prince Frederik.

Marks transition, coinciding with Queen's accession anniversary in 1972

Back surgery in 2023 prompts thoughts about the future, leading to the decision to step down.

PM Mette Frederiksen expresses gratitude for Queen's dedication to the Kingdom.

"Epitome of Denmark," Queen shapes national identity in ceremonial role.

At 6 feet tall, Queen Margrethe's unescorted walks in Copenhagen endear her to the public.

Keen skier, engaged in Danish air force, and visited troops in Afghanistan at 70.

As head of state, Queen adheres strictly to constitution, avoiding party politics.

Heir since birth, served as regent since 18, ready to ascend the throne.

Crown Prince Frederik proclaimed king, Crown Princess Mary becomes queen, marking a new era in Denmark's history.