now known as localized road 530, which still connects the marine center with La Spezia via Fezzano, Le Grazie and Terizzo. In 1815 it was incorporated in the Kingdom of Sardinia, according to the decisions of the Congress of Wien of 1814, and subsequently in the Kingdom of Italy from 1861. From 1859 to 1927 the territory was included in the First district of La Spezia, part of the Eastern District of the Province of Genoa before and, with its establishment in 1923, the Province of La Spezia. In 1998 it obtained for its architectural heritage and natural entry in the list of protected World Heritage Site, with the Rolli in Genoa's historic center, one of only two Ligurian sites, and in 2001 established the eponymous Regional Natural Park. Coat of arms The municipal Coat of arms was approved by the special decree of the Head of the Government dated 19 April 1933. In addition to the emblem and banner of the city is the cross of St. George to be also a symbol of civic and historical community of Porto Venere, including banner bearing its coat of arms (the color of Genoa are the flags of the three towers) and wants to emphasize the secular alliance of the village with the ancient Republic of Genoa. This "objective" is also mentioned in the municipal charter. Territory The village lies at the southern end of a peninsula, which, breaking away from the jagged coastline of the Riviera di Levante, forming the western tip of the Gulf of La Spezia. At the end of this peninsula are three small islands: Palmaria, Tino and Tinetto; only Palmaria Island, which lies directly opposite the village of Porto Venere beyond a narrow strait, is partially inhabited. It is bordered to the north by the municipality of La Spezia, and to the south, west and east by the Mediterranean Sea. It is about south of La Spezia and southeast of Genoa. There is a conveyor system with the sewer grates and pumps that push the waste into a subsea pipeline that comes out to about beyond the toe of St. Peter. The strong current and high depth of discharge, about , contribute to the rapid dispersion of the fluid. The beaches of the area are a tourist attraction. Climate The climate is typically Mediterranean, with almost no excess heat in summer and no freezing in winter.