Documentation: The Heinrichslinde in Braunschweig, also known as Heinrich the Lion's linden, cathedral or castle linden, is an important single tree on the cathedral square and is considered a green landmark of the city. Today's linden tree replaces the historic one, which according to legend was planted by Henry the Lion himself in 1173, before construction work began on Braunschweig Cathedral, and which was considered the oldest tree in the city until it collapsed in 1894. The old tree was a large-leaf linden (Tilia platyphyllos), the new one is a small-leaved linden (Tilia cordata). It has a height of 19 m, a trunk circumference of 2.10 m and a crown diameter of 12 m. The linden tree stands on the western part of the cathedral square, the southern side of the cathedral and is surrounded