A court found 15 men guilty of coordinating a series of suicide bombings in hotels and churches, which killed more than 300 people.
The suicide bombings were the deadliest attacks in the country since the end of its civil war in 2009.
The Islamic State group-inspired attacks were among the deadliest in Sri Lanka's history, killing 42 foreigners.
The 2019 attacks were the deadliest the country had seen since the end of its civil war.
