Mythology: Egyptian: The god of the Dead?

Questions

In 254 St ---------- begins his reign as Catholic Pope?

In 1820 Florence ---------- Florence, Italy, nurse (Crimean War), born?

In 1881 Treaty of---------- , Tunisia becomes a French protectorate?

In 1937 Beryl ---------- UK, won record (7) women's cycling titles, born?

In 1940 Nazi blitz conquest of France began by crossing ---------- River?