

The first thing that stands out to me in this European office vacancy rate chart from Savills is the difference between Paris-La Défense (~15%) and Paris-CBD (2%).
For those of you who maybe aren't familiar, La Défense is the largest purpose-built business district in Europe. It houses upwards of 40 million square feet of office space and covers about 1,400 acres. It's also more or less where Paris decided to allow and put tall buildings. Though, it is about 3 km west of the city limits.