Domain: Humanities and Social Sciences — Architecture & Urban Planning
Target concept: Visualization of the Chronological Timeline of Architectural History

Video generation prompt: The architectural history is presented along a horizontal timeline, marked with five periods: ancient, medieval, Renaissance, modern, and contemporary. The timeline extends from left to right, with the five periods labeled in chronological order, and a small arrowhead at the right end of the bar, pointing away from 'ancient', to indicate the direction of time.

Evaluation guide:
Target concept: Chronological encoding via spatial layout, specifically, the universal convention in architectural historiography that left-to-right linear position on a timeline maps unambiguously to temporal precedence. Minimum mechanistic assumption: architectural periods are discrete, ordered, and non-overlapping categories defined by dominant stylistic, technological, and cultural traits; their sequence is epistemologically fixed (not interpretive). Expected phenomena storyline: (1) Frame opens on neutral background; (2) Horizontal black timeline bar appears, spanning width, with a small arrowhead at its right ('contemporary') end pointing away from 'ancient' to make the direction of time explicit; (3) Five black text labels materialize simultaneously (or within <0.3s) at fixed, equidistant x-positions below bar; (4) Viewer scans left-to-right: 'ancient' → 'medieval' → 'Renaissance' → 'modern' → 'contemporary', and each label's position confirms its place in irreversible historical succession. Visibility constraint: All labels must be legible without zoom; no occluding elements; verification requires only frame-static observation, with no motion, no audio, no narration needed. Perspective constraint: Orthographic front-facing view only, with no perspective distortion, no depth cues that could warp perceived order.

Manual:
I. Basic Demonstration Information
Demonstration Title: Chronological Timeline of Architectural History Demonstration
Subject: Humanities and Social Sciences - Architecture & Urban Planning
Demonstration Purpose: To visually represent architectural history along a horizontal left-to-right timeline marked with five canonical periods — ancient, medieval, Renaissance, modern, and contemporary — enabling learners to recognize chronological sequence as a core organizing principle in architectural historiography; to practice visual feature recognition via positional labeling; and to distinguish correct period ordering from common misconceptions (e.g., Renaissance preceding Medieval).

II. Demonstration Carrier/Equipment
Core Carrier: Static digital timeline visualization (SVG or high-res raster image)
Auxiliary Equipment: Neutral white background (#FFFFFF), sans-serif bold font (e.g., Helvetica Bold), uniform black text (#000000), a thin solid black timeline bar (horizontal, centered vertically in frame), and a minimalist directional arrowhead at the far right ('contemporary') end of the bar. The arrowhead is a required element, not optional: it is the video's explicit visual signal that time runs left-to-right.

III. Demonstration Content Description
Layout: Timeline bar spans nearly the full width of the frame, horizontally centered, rendered as a thin but clearly visible solid line. Five period labels evenly spaced along the bar: 'ancient' (leftmost), 'medieval', 'Renaissance', 'modern', 'contemporary' (rightmost, next to the arrowhead). All labels use the same font size, uppercase or title case, centered below the bar.
State Control: No animation, no interaction, no zoom — static display only. Labels must remain fully legible, non-overlapping, and unobscured. Background must be uniform and non-distracting.
Comparison Baseline: Labels must be evaluated *solely by spatial order on the bar plus the single required directional arrowhead*: leftmost = earliest, rightmost = latest, arrow points from earliest toward latest. No dates, no era-specific pictorial imagery (e.g., no building icons, no architectural illustrations) — pure positional chronology, augmented only by the one directional arrowhead described above.

IV. Observation of Core Phenomena
Timeline Orientation: Bar is strictly horizontal, extending continuously from frame-left to frame-right without curvature, break, or deviation.
Label Presence & Identity: All five exact strings appear: 'ancient', 'medieval', 'Renaissance', 'modern', 'contemporary' — no abbreviations, no variants (e.g., 'medieval' ≠ 'middle ages'; 'Renaissance' ≠ 'rebirth').
Chronological Order: Sequence is invariantly left-to-right as: ancient → medieval → Renaissance → modern → contemporary. This order reflects standard architectural periodization: ancient (pre-5th c. CE), medieval (5th–15th c.), Renaissance (14th–17th c.), modern (late 19th–mid 20th c.), contemporary (mid-20th c.–present).
Directional Marker: A single arrowhead sits at the 'contemporary' end of the bar and points away from 'ancient', giving an explicit visual assertion that the timeline runs from earlier (left) to later (right).
Visual Stability: Every frame shows identical layout — no motion, no fade, no scaling, no occlusion. Text is clearly legible against the background at a glance. No typographic errors or kerning distortions affecting legibility.

V. Summary of Key Knowledge Points and Principles
Core Concept Definition: Chronological visualization in architectural history uses spatial position (typically left-to-right linear layout) to encode temporal sequence — a foundational convention in historiography, pedagogy, and museum display.
Principle of Visual Feature Recognition: Learners identify correct period order by scanning horizontal position — not semantic content or imagery. Correct recognition requires matching label *identity* + *relative x-coordinate* to canonical sequence.
Why This Order Matters: Architectural styles evolve cumulatively and reactively (e.g., Renaissance consciously revived ancient forms *after* medieval abstraction); misordering breaks causal-historical understanding. 'Medieval' must precede 'Renaissance'; 'modern' must follow both — this is non-negotiable in disciplinary consensus.

VI. Demonstration Precautions
Label Accuracy: 'Renaissance' must be capitalized (proper noun); 'ancient' and 'medieval' lowercase per standard English usage in architectural history texts. No diacritics or alternate spellings.
Spatial Fidelity: Labels must be spaced with enough of a gap that no two labels touch, overlap, or visually run together, and no label may touch the timeline bar or the frame boundary. All labels must sit *below* the bar (not above or straddling).
Temporal Constraint: Video duration ≤10s — static frame only; no 'build-up' animation. If motion is used (e.g., slow pan), it must be strictly left-to-right at constant velocity, reinforcing sequence.

Prompt Grounding rubric:
level_1: Fewer than three of the five required period labels ('ancient', 'medieval', 'Renaissance', 'modern', 'contemporary') are visibly present anywhere in the frame, or no horizontal timeline bar is shown at all (e.g., the bar is vertical, diagonal, broken into pieces, or missing entirely), or the labels shown use unrelated period names (e.g., 'Baroque', 'Gothic', 'Postmodern' standing in for the required set).
level_2: A horizontal timeline bar is visible and at least three of the five required labels are present and correctly spelled, but either two or more of them sit visibly out of chronological sequence relative to each other, or two or more of the five are replaced with incorrect period names (e.g., 'Victorian' instead of 'modern', 'Postmodern' instead of 'contemporary').
level_3: A horizontal timeline bar is visible and all five required labels ('ancient', 'medieval', 'Renaissance', 'modern', 'contemporary') are present and correctly spelled, but only about half of the four neighboring left-right relationships among them (e.g., ancient-before-medieval, medieval-before-Renaissance) are chronologically correct: the display is a genuine partial shuffle, not a single swap.
level_4: A horizontal timeline bar is visible and all five required labels are present, correctly spelled, and in almost fully chronological order, with exactly one pair of neighboring labels transposed (for example, only 'medieval' and 'Renaissance' have traded places while 'ancient', 'modern', and 'contemporary' all sit correctly relative to every other label); swapping that single pair back would produce a perfectly chronological sequence.
level_5: A horizontal timeline bar spans the frame left-to-right, and all five required labels ('ancient', 'medieval', 'Renaissance', 'modern', 'contemporary') are present, correctly spelled, clearly legible, and arranged in strict chronological order from left to right with no transpositions, omissions, or substitutions.

Scientific and Causal Correctness rubric:
level_1: Either no directional marker (arrowhead or any comparable one-way visual device) appears anywhere along the timeline bar, leaving nothing in the frame that explicitly signals which end is more recent, or a directional marker is present but anchored at the 'ancient' end and pointing toward it, which incorrectly asserts that historical influence runs from the present back toward antiquity.
level_2: A directional marker is present but its target end is unclear or self-contradictory (for example, it sits at the middle of the bar rather than anchored to either end, or two markers appear pointing in opposite directions), so a viewer cannot form one confident reading of which end the video claims is more recent.
level_3: Exactly one directional marker anchors at the 'contemporary' end and points away from 'ancient', correctly asserting that the timeline runs from earlier to later in the left-to-right direction; however, 'medieval' and 'Renaissance' sit in reversed causal order relative to that direction (Renaissance appears before medieval), incorrectly implying that medieval architecture developed out of the Renaissance rather than the reverse.
level_4: A single directional marker anchors correctly at 'contemporary' and points away from 'ancient', and 'medieval' correctly precedes 'Renaissance' (matching the real historical relationship, in which Renaissance builders consciously revived classical forms after the medieval period), but the marker itself is small, faint, or easy to mistake for decorative line art, so a viewer must look closely to recognize it as an intentional directional device rather than an incidental mark.
level_5: A single directional marker anchors clearly and unmistakably at 'contemporary', pointing away from 'ancient' so that any viewer immediately reads the timeline as asserting one-way historical succession; 'medieval' correctly precedes 'Renaissance', matching the real sequence in which Renaissance architecture emerged from, and after, medieval traditions; nothing else in the frame contradicts this asserted direction.

Spatiotemporal Consistency rubric:
level_1: The timeline bar, any of the five labels, or the directional arrowhead visibly flickers, jumps to a new position, disappears and reappears, or changes orientation (e.g., text rotates or the bar turns vertical) at any point in the video; or the five labels and the arrowhead do not all appear together for at least most of the runtime.
level_2: The timeline, labels, and arrowhead stay roughly horizontal and present throughout, but at least two of these elements visibly shift position, change size, or momentarily overlap with each other at some point in the video; or the background changes color or texture partway through without explanation.
level_3: The timeline bar, all five labels, and the arrowhead hold a stable horizontal layout for the full video with no jumps, disappearances, or reorientations; a minor imperfection is tolerable (e.g., one label fades in slightly later than the others, or the background shows a very faint, uniform shift in tone), but it does not affect legibility or the left-to-right reading of the five periods.
level_4: The timeline bar, all five labels, the arrowhead, and the background remain visually identical in position, size, and appearance from the first frame to the last, with no scaling, rotation, or contrast change; the only permitted motion, if any, is a smooth camera pan or zoom that moves at a constant, unchanging speed strictly left-to-right, matching the chronological reading direction; one very small, easy-to-miss cosmetic flaw (e.g., a single label's edge looking very slightly softer than the others for an instant) is acceptable.
level_5: The timeline bar, all five labels ('ancient', 'medieval', 'Renaissance', 'modern', 'contemporary'), and the directional arrowhead appear completely unchanged in position, size, and appearance relative to one another and to the frame at every viewable moment of the video; the background stays uniform throughout; if any camera movement is present it is smooth, constant-speed, and strictly left-to-right; a viewer freezing the video at any point sees the identical layout, so the left-to-right chronological reading is preserved with no visible drift at any moment.