The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Fraport's[2] own Terminal 3 press kit states 'the groundbreaking ceremony for Terminal 3 took place on October 5, 2015.'
Fraport's own press kit citing the October 5, 2015 groundbreaking date and roughly €4 billion cost.
Fraport[2] project site describing the October 2015 groundbreaking ceremony.
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