Wikipedia
The Merkel-Raute (German for "Merkel's rhombus") is what has been termed Merkel diamond or "Triangle of Power" by English-speaking media, a hand gesture made by resting one's hands in front of the stomach so that the fingertips meet, with the thumbs and index fingers forming a rough quadrangular shape. This signature gesture of Angela Merkel, the current German Chancellor, has been described as "probably one of the most recognisable hand gestures in the world".
Asked about how the Merkel-Raute was introduced as her trademark, Merkel stated that "there was always the question, what to do with your arms, and that's how it came about." She chose the gesture without having been assisted by a counsellor because "it contains a certain symmetry."