For a generation of Sydney evangelicals, the Katoomba Christian Conventions weren’t just events in the calendar - they shaped church programs across the city.

In the 80s, 90s and early 2000s, thousands gathered under the circus tent and then later in packed auditoriums to hear the Bible taught, sing with conviction and be raised up for ministry.

But how did Katoomba become such an influence in Sydney evangelicalism? What decisions shaped its extraordinary impact? And what lessons are there for today.