This is where you can build buildings. They are separated by Resources, Institutions, and Defense, and below this is a hotlink menu to any specific type of each. Note that many buildings besides the starting ones will cost resources.

If you input a number of buildings you want to construct, the resources needed will display on the right. You can then click Buy Resources and it will take you to local trade with the appropriate numbers already inputted, if there is local trade available. Then you can click Back to Construction and it will take you back to where you were.

Also on this screen is where you can see which type of what buildings you have. For example, if you have 1 150% research facility and 1 100% facility, on the Overview Screen it will say 2 at 125%, but on Construction it will show both the 1 150% and 1 100% facilities at the bottom.