Here's a short story:

Gothic architecture is a style of architecture that flourished during the high and late medieval period. It evolved from Romanesque architecture and was succeeded by Renaissance architecture. Originating in 12th-century France and lasting into the 16th century, Gothic architecture was known during the period as Opus Francigenum ("French work") with the term Gothic first appearing during the later part of the Renaissance. Its characteristics include the pointed arch, the ribbed vault and the flying buttress. Gothic architecture is most familiar as the architecture of many of the great cathedrals, abbeys and churches of Europe. It is also the architecture of many castles, palaces, town halls, guild halls, universities and to a less prominent extent, private dwellings, such as dorms and rooms. 

It is in the great churches and cathedrals and in a number of civic buildings that the Gothic style was expressed most powerfully, its characteristics lending themselves to appeals to the emotions, whether springing from faith or from civic pride. A great number of ecclesiastical buildings remain from this period, of which even the smallest are often structures of architectural distinction while many of the larger churches are considered priceless works of art and are listed with UNESCO as World Heritage Sites. For this reason a study of Gothic architecture is largely a study of cathedrals and churches. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: What time period did Gothic architecture begin?
Guess: 12th-century

Question: What country?
Guess: France

Question: It continued until when?
Guess: into the 16th century

Question: What was this era known as?
Guess: Opus Francigenum

Question: What does that translate to?
Guess: "French work

Question: Was this during medieval times?
Guess: yes

Question: Which part?
Guess: high and late

Question: When was the word Gothic first seen?
Guess: later part of the Renaissance

Question: What continent is it most prevalent?
Guess: Europe

Question: Is it in churches there?
Guess: yes

Question: What about cathedrals?
Guess: yes

Question: What kind of buildings are still around from that time?
Guess: many castles, palaces, town halls, guild halls, universities and to a less prominent extent, private dwellings, such as dorms and rooms

Question: What organization lists some of the churches?
Guess: UNESCO

Now answer the following question in the same format.

Question: As what?

World Heritage Sites