The first billboard was on the corner of North Terrace and Frome Road.
A spokesman for the campaign, Reverend Stu Cameron, says the billboards are part of a broader media campaign.
"As we've done right through the ages [we] have used various media to remind the community that Jesus' message is as relevant today as it has been in time past," he said.
"Also, to encourage them to connect with local church communities where a whole heap of fantastic opportunities to grow and develop can be taken up."