The first stone built Glasgow Cathedral was dedicated in the presence of King David I in 1136. The present building was consecrated in 1197. Since that same period the Cathedral has never been unroofed and the worship of God has been carried out within its walls for more than 800 years. The splendid achievements of the architects and builders of those far off days can be studied and admired. Not everything, however, is old and the Cathedral has one of the finest post-war collections of stained glass windows to be found in Britain. The Cathedral has a regular and active congregation, and no visitor should leave the city without making a visit. Unusually, the church is Crown property and is cared for by Historic Environment Scotland on behalf of Scottish Ministers. Historic Environment Scotland have written a souvenir guidebook, and provide expert interpretation to help bring the medieval Cathedral to life – after all, this is the best preserved example of a large church to have survived from the medieval period in Scotland.