Three codes were hidden in the #THEMINDPALACE post on the Investigate Ingress blog.

[1] wkupqmvlawkrxjkwsvladvhys

[2] z7r5a 8ksw2

[3] ed da rd po d7 7t a3 6m

Code #1


All letters, an ancient roman emperor will guide you

Code #2


Look at it from another angle and everything is there

Code #3


Not much to say on that one except that the split tells you what to do