The decaying "Tree of Knowledge" outside the School of the Arts (Sota) in Dhoby Ghaut was felled yesterday afternoon. The 33.6m-tall Angsana tree (2nd photo) was estimated to be about 40 years old. When Sota was built eight years ago, care was made to incorporate the towering tree into the design of the school's facade. But in 2013, an arborist noted that the tree was showing signs of decay at its base. Cables were installed the following year to support it. Last Friday, Sota announced that the tree would have to be cut down "for the safety of students, staff and members of the public". The school intends to create works of art from parts of the tree trunk and plant a new sapling at a later date.