The West Front of the Cathedral of Santiago de Compostela is perhaps the most immediately familiar image, but I had to turn to Wikipedia for help as the building is currently under wraps. This façade of the Cathedral overlooks Obradoiro Square and was added to the original building in 1740.

Cathedral of Santiago, West Front (Wikipedia)
All the bell towers started building with the original cathedral in the 11C, but were increased in height or embellished as time passed. The Clock Tower overlooking the Praza de Pratarias illustrates this continued work.

Torre de la Trinidad, the Clock Tower
Standing in the nave, looking towards the high altar, my view was dominated by the Baroque embellishments.
Even in the Chapels.
And then there is the organ…
The Cloisters of 1533 are quietly grand can be seen when visiting the Cathedral Museum, a fascinating visit with models of the cathedral, reconstruction of cloisters, and beautiful tapestries. No photography is allowed inside the building. (It was pouring with rain!)
You may be interested in
3D representation of the Cathedral
Santiago, including the Cathedral
The Cathedral and here and here