enjoy extraterritorial status similar to that of foreign embassies. These properties, scattered all over Rome and Italy, house essential offices and institutions necessary to the character and mission of the Holy See. Castel Gandolfo and the named basilicas are patrolled internally by police agents of Vatican City State and not by Italian police. According to the Lateran Treaty (Art. 3) St. Peter's Square, up to but not including the steps leading to the basilica, is normally patrolled by the Italian police. There are no passport controls for visitors entering Vatican City from the surrounding Italian territory. There is free public access to Saint Peter's Square and Basilica and, on the occasion of papal general audiences, to the hall in which they are held. For these audiences and for major ceremonies in Saint Peter's Basilica and Square, tickets free of charge must be obtained beforehand. The Vatican Museums, incorporating the Sistine Chapel, usually charge an entrance fee. There is no general public access to the gardens, but guided tours for small groups can be arranged to the gardens and excavations under the basilica. Other places are open to only those individuals who have business to transact there. Climate Vatican City's climate is the same as Rome's: a temperate, Mediterranean climate Csa with mild, rainy winters from October to mid-May and hot, dry summers from May to September. Some minor local features, principally mists and dews, are caused by the anomalous bulk of St Peter's Basilica, the elevation, the fountains, and the size of the large paved square. The highest temperature ever recorded was , on both 2 August 2017 and 27 June 2022. In July 2007, the Vatican accepted a proposal by two firms based respectively in San Francisco and Budapest, whereby it would become the first carbon neutral state by offsetting its carbon dioxide emissions with the creation of a Vatican Climate Forest in Hungary, as a purely symbolic gesture to encourage Catholics to do more to safeguard the planet. Nothing came of the project. On 26 November 2008, the Vatican itself put into effect a plan announced in May 2007 to cover the roof of the Paul VI Audience Hall with solar panels. Gardens Within the territory of Vatican City are the Vatican Gardens (), which account for about half of this territory. The gardens, established during the Renaissance and Baroque era, are decorated with fountains and sculptures. The