Kathryn Gustafson’s Princess Diana Memorial Fountain is a serene and beautiful piece of work.

It reveals that the jury’s choice of a landscape designer over the architects in the list, such as my office, or artists such as Anish Kapoor, was the right decision. Our experience was that the jury was well chosen, well lead, engaged and effective.

Gustafson’s shaping and texture of the stone and the use of water are technically and artistically brilliant. It makes sense of its location in ways that have great depth and will reveal themselves over time.

Tony Fretton, London