An art gallery is read as the inner images you carry and how you see the world. Walking through one in a dream is traditionally a look at your own creativity — and at what you choose to put on display.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.