Structural assessment of a historical building requires many different applications, such as in-situ observations, in-situ measurements such as minor destructive or non-destructive tests and numerical analyses. Minor destructive and non-destructive tests such as ultrasonic tests and ambient vibration tests are used to collect data from the structures such as material properties and dynamic characteristics. Also, numerical analyses the enable examination of the structural condition of different load simulations such as static and dynamic loads. Structural-condition assessment of a historical building should be practiced in both experimental and numerical methods to obtain reliable results. This paper includes the structural-condition assessment of a nineeenth-century historical masonry school building. The assessment contains geometrical checking and seismic performance evaluation and requires consideration of relevant code and guidelines. At the end of the analyses, maximum displacements, stresses and strains were obtained and presented in detail using contour diagrams. In terms of the relevant guideline, the building showed a limited damage performance level during the applied earthquake record as follows: 0.16% < 0.3%. The maximum displacement was obtained as 27.8 mm at the top point of the building. Also, the building generally met the code requirements in terms of geometrical properties.