Originally Posted by Hed Kandi
Because many of Gaudi's original works were lost, how much of the newly constructed building is actually adhering to Gaudi's original work or has it simply been improvised?
As I understand it, the Passion Facade deviates greatly from Gaudi's work. As well as much of the newly constructed pillars are made of concrete where as the original were made out of stone.
Some of the design has already changed, if you look at some of the detailed icons on the newer facades, they look different than what Gaudi's do. Honestly, I think this is great, since you can see the evolution of the building as it is built. The master plan and major details are built according to Gaudi's ideas (of which we have more than enough information to complete it), while the smaller intricacies have to be figured out by contemporary architects.
This is not anything new when it comes to building grand structures. Many of the Italian Cathedrals and churches had multiple architects working on them, and often changing the design to match their aesthetic values. A great example of this is St. Peter's in the Vatican. The building took a very long time to complete, and had many head architects. Michelangelo's dome was actually the third iteration of a dome for it. If you look closely, you can actually see the "hand" of all the different people who designed it.
We have without a doubt grown accustomed to finishing grand projects within decades, but for most of history, huge projects like these would often span centuries to be finished.