German engineers considered several weaponry options when developing 10,000-ton ships. The lightest of the projects under consideration was the I/10 project, with eight 210 mm guns housed in four turrets. At the same time, the first modern German light cruisers carried 150 mm triple-gun turrets. The size and layout of the I/10 project allowed for the use of four such turrets in place of 210 mm gun mounts.