Sineus and Truvor were the brothers of Rurik, a chieftain of the Varangian Rus tribe considered to be the founder of the Rurik dynasty, which ruled the Kievan Rus. According to the Russian Primary Chronicle, the town of Izborsk was the seat of Truvor from 862 to 864. Although his burial mound is still shown to occasional tourists, archaeological excavations of long barrows abounding in the vicinity did not reveal the presence of the Varangian settlement at the site, which indicates that Izborsk was an important centre of the early Krivichs.
Truvor's gorodishche is a settlement about half a kilometer north from the fortress that came about in the late 7th and early 8th century, and proceeded to grow twice in size in the 10th and 11th centuries. It was the predecessor of the Izborsk Fortress, protected by an oakwood wall which was later upgraded to stone, 3 meters in height by 3 meters in width in the 12th century. Though Truvor's gorodishche is mostly destroyed, a small part of the wall remains today.References:
The Church of St Eustace was built between 1532-1632. St Eustace"s is considered a masterpiece of late Gothic architecture. The church’s reputation was strong enough of the time for it to be chosen as the location for a young Louis XIV to receive communion. Mozart also chose the sanctuary as the location for his mother’s funeral. Among those baptised here as children were Richelieu, Jeanne-Antoinette Poisson, future Madame de Pompadour and Molière, who was also married here in the 17th century. The last rites for Anne of Austria, Turenne and Mirabeau were pronounced within its walls. Marie de Gournay is buried there.
The origins of Saint Eustache date back to 13th century. The church became a parish church in 1223, thanks to a man named Jean Alais who achieved this by taxing the baskets of fish sold nearby, as granted by King Philip Augustus. To thank such divine generosity, Alais constructed a chapel dedicated to Sainte-Agnès, a Roman martyr.