There are many different types of pastry. The two most common being puff pastry and filo (phyllo) pastry. Puff pastry is much more fluffy and contains large amounts of butter whereas filo pastry is quite often fat-free and requires very few ingredients.
When you pull up a recipe from the internet, the majority of the results you’ll find will not be suitable for celiacs or gluten-intolerant individuals. That is because the basis of the recipe is flour.