Iglesia de Santa Barbara dates back to 1599 and though a bit out of the very center of town, it is well worth the walk as it is still open to the public and has a very impressive Mudejar ceiling. Photos inside are unfortunately not permitted.
Carrera 11 No. 16-62
The 16th century Iglesia de San Francisco was said to house an incredibly realistic sculpture of Christ and intricate archway but the exterior looked in a bit of disrepair and it was not open the two times we passed by it. Hopefully, it is being restored to its former glory and is open to the public to help Tunja become the tourist attraction it can be.
Carrera 10 No. 22-23