I have to agree with what has been said so far, and add a couple of observations. It's not terrible, but there is room for improvement.
I see what you tried to do with the heiroglyphs in the upper righthand corner, but they are hidden by color. They blend into the background, and seem a little out of place. Maybe incorporate them some other way (transparent overlay?).
As far as the text, "The GEM (Grand Egyptian Museum)" could maybe be shortened to just "Grand Egyptian Museum," since you already are using the GEM acronym very near that text. The rest of the text is too uncomfortable to read, and needs to be worked out differently.
Also, is the photo used a rendering of the future museum? It's really hard to see what it is. My suggestions would be to tone down the color saturation on the bottom blue area, for starters, and do something with the sky. A good method to see how readable your poster will be is to look at the whole thing in grayscale mode. This will show what will pop and what will fade into the background.
Hope this helps, and good luck!