[Oreb]

Many churches were in construction for over a century, yes. Today? I’m not familiar with any examples other than Sagrada Familia, and even that one is almost finished. These multi-generation building projects seem to be a thing of the past.

Imagine trying to get funding today for a building project that is scheduled to be completed long after everyone alive today would be dead. I can’t imagine that being possible. It’s a pity: I wonder what wonders we could have built using modern technology over such a long timescale.

[akgerber]

The Cathedral of St John the Divine in New York is also unfinished, with construction in fits & starts since 1892: https://en.wikipedia.org/wiki/Cathedral_of_St._John_the_Divi...

[branko_d]

Hram Svetog Save (Church of Saint Sava) in Belgrade/Serbia started construction in 1935 and the exterior was finished in 2017. I haven’t been there in several years, but my understanding is that the interior is still being worked on and will continue for some years to come…

So not quite “over a century” but getting close. :)