Pita Gyros/Souvlaki - Standard Fillings is the explainer entry: the fixed national grammar of what goes inside a Greek pita when you order gyros or souvlaki and do not qualify it. The standard set is meat, tomato (ntomata), onion (kremmydi), tzatziki, and French fries (patates) rolled inside. The angle here is that this list is not a suggestion, it is the default contract, and that fries inside the pita is the detail that marks the build as Greek rather than anything else.
The assembly runs in a set order and the order matters. A round of pita griddled soft and brushed with oil; a smear of tzatziki on the bread so the load has something to grip; the meat next, either gyros shaved off the vertical spit or souvlaki pulled off skewers; then sliced tomato and raw onion; and the fries tucked in last so they stay crisp against the paper instead of steaming soft under the sauce. Good execution keeps each element doing its job: tzatziki binds and cools, tomato carries acid and moisture, onion seasons, fries add salt and bulk, meat brings the savor and the crust. Sloppy work is a cold pita that cracks when rolled, fries buried under wet sauce so they go limp, a flood of tzatziki that soaks through the wrap, pale watery tomato, or onion cut so coarse it dominates. The cone has to seal at the base or the whole standard load slides out the bottom.
How it shifts is mostly meat and region, not the filling list, which is why this entry exists as a reference: every other order on the catalog is phrased as a change to this baseline, horis this left out or me that added. Gyros gives you shaved spit-roasted pork or chicken; souvlaki gives you grilled skewered chunks of the same; the surrounding tomato-onion-tzatziki-fries set stays constant either way. Regional defaults nudge it: an Athenian round leans on the standard five as listed, while a Thessaloniki-style build often swaps mustard and ketchup in and the tzatziki out as its own baseline. The meat preparations themselves, the spit and the skewer, the marinades behind them, each deserve their own article rather than being crowded in here; at this entry the point is the fixed filling set, the order it goes in, and that the fries belong inside.