Nicholas Kao Se Tseien (15 January 1897 – 11 December 2007) was a Chinese supercentenarian who is currently unverified. If his age is true, at the time of his death at the age of 110 years, 334 days, he would have been the second-oldest man in Asia, the oldest Roman Catholic priest in modern times, and the oldest person to have undergone a cataract operation.