--- /dev/null
+#ifndef MSP_LINAL_MATRIX4_H_
+#define MSP_LINAL_MATRIX4_H_
+
+#include "squarematrix.h"
+
+namespace Msp {
+namespace LinAl {
+
+/**
+A 4x4 square matrix, capable of expressing affine transformations in a
+three-dimensional vector space.
+*/
+template<typename T>
+class Matrix4: public SquareMatrix<T, 4>
+{
+};
+
+} // namespace LinAl
+} // namespace Msp
+
+#endif