Carolaturm, observation tower in Koblenz, Germany

The Carolaturm is a roughly 7-metre-high viewing tower of slate rubble masonry on a 5/8 ground plan, built in Koblenz's Lay district on the steep slope above the Mosel. Buttresses and a battlemented top, capped with basalt keystones, give it a medieval look; the keystone over the entrance is dated 1895. Its single ground-level room, lit by four pointed-arch windows and covered by a cell vault, serves as the viewing level.

The Carolaturm was built in 1895–1896 on the initiative of the Coblenzer Verschönerungsverein, following plans by city architect Friedrich Wilhelm Maeckler. It was named after the wife of mayor Emil Schüller. Forest and gymnastics festivals were held here, and during the Nazi era ideological events took place. Renovations are documented for 1922, 1962, 1980, 2006 and 2023.

The tower is named after Carola Schüller, wife of Koblenz mayor Emil Schüller, not a financier. The Coblenzer Verschönerungsverein built it in 1895–1896, and forest and gymnastics festivals were later held on the slope around it; during the Nazi era the site hosted ideological gatherings.

The tower stands south of Koblenz-Lay on a steep slope above the Mosel, reached on foot from the Layer Bergweg. The entrance side lies at ground level, so the interior viewing level with its four pointed-arch windows is entered without climbing stairs. Sturdy shoes are advisable for the slope.

The tower has no staircase: its interior, level with the ground on the entrance side, is a single vaulted room with four pointed-arch windows serving as the viewing level. The keystone above the entrance bears the year 1895, and the buttresses and battlements are capped with basalt keystones.