Dreaming of an obelisk shows a great sense of perpetual significance. During a period of their own enlightenment,the ancient Egyptians built the obelisks as a place in which even the gods themselves dwelled in. Dreaming of these pillars of art shows not only an affinity for great power, but also of everlasting and immortal memorialization. Thus, that which has survived for so many millenniums will continue to do so for a very long time. You will be remembered by many others for ages to come.