But in May, an elephant carcass was discovered by June Richard Moller, Executive Director of the Trust, and on Friday the Trust confirmed it was Satao, who had been killed by a poisoned arrow.
In a statement, the Trust paid tribute to "the most iconic and well-loved tuskers" and mourned "a great life lost so that someone far away can have a trinket on their mantelpiece".
It said: "This magnificent elephant was widely known in Tsavo East National Park, where he was observed with awe by many thousands of Tsavo's visitors over the years.
"No longer will Tsavo and Kenya benefit from his mighty presence. Satao was shot dead by poisoned arrow on 30th May 2014.
"The arrow had entered his left flank and he stood no chance of survival. We spotted his carcass on 2 June but to avoid any potential false alarms, we first took pains to verify the carcass really was his.
"Today it is with enormous regret that we confirm there is no doubt that Satao is dead, killed by an ivory poacher's poisoned arrow to feed the seemingly insatiable demand for ivory in far off countries."
-The Independent