The particular context for the use of the Leaning Tower of Pisa was the planning application by RWE Renewables to Denbighshire County Council for a 90-metre-high meteorological mast on land at Mynydd Mynyllod, Llandrillo, near Corwen.
If planning permission is granted, the purpose of the mast the mast will be to collect wind data for three years to see whether the field is a suitable site for a wind farm.
According to Wikipedia, the height of Pisa’s famous tower is 55.86 metres from the ground on the low side and 56.67 m on the high side.
Your ‘umble scribe wonders what its equivalent is in football pitches, sizes of Wales and Stockholms (posts passim). 😉