In London, it is 16.4 years old, Paris — 19.0, Rome — 20.9, Kyiv — 20.1, Moscow — 17.2 and St. Petersburg 15.9 years. The closest to the record holders are Riga (6.8 years), Helsinki (7.1), Tallinn (7.9), Brussels (8.0), Copenhagen (8.3), Lisbon (8.4), Vienna ( 9.3) and Oslo (10 years).