More than 100 firefighters battled a devastating blaze at one of New York's last Gilded Age mansions that's currently on sale for $50 million. Flames burst out of the windows of the townhouse at 854 Fifth Avenue – which is home to the Serbian Mission to the United States – after a fire broke out on the third floor at around 8.40pm on Sunday. The two-alarm fire was declared under control shortly before 10pm, CBS New York reported. Three firefighters and a civilian were injured in the blaze, the FDNY said. The Beaux Arts mansion – which has 32 rooms,...