Research any topic before you write.
Find related topics. | Discover entities. | See connections. | Build a topical map.
Year 421 (CDXXI) was a common year starting on Saturday of the Julian calendar. At the time, it was known as the Year of the Consulship of Agricola and Eustathius (or, less frequently, year 1174 Ab urbe condita). The denomination 421 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method…
Art & Regions
Explore the main themes, entities and connections around 421. Start with the topic map, then use the sections below for research and deeper semantic analysis.
Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.
High-confidence facts extracted from structured source data. Use them as anchors for further research.
Browse the full topic structure. Each item opens a new analysis centered on that subject.
Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.
See the strongest relationship patterns around the current topic before diving into the raw triples.
Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.
roman year calendar cdxxi empire europe julian ab urbe condita era constantius iii western theodosius ii time franks thrace ardaburius
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| 421 | - Kali Yuga | 3521–3522 | 1.00 | infobox |
| 421 | - Shaka Samvat | 342–343 | 1.00 | infobox |
| 421 | - Vikram Samvat | 477–478 | 1.00 | infobox |
| 421 | Ab urbe condita | 1174 | 1.00 | infobox |
| 421 | Assyrian calendar | 5171 | 1.00 | infobox |
| 421 | Balinese saka calendar | 342–343 | 1.00 | infobox |
| 421 | Bengali calendar | −173 – −172 | 1.00 | infobox |
| 421 | Berber calendar | 1371 | 1.00 | infobox |
| 421 | Buddhist calendar | 965 | 1.00 | infobox |
| 421 | Burmese calendar | −217 | 1.00 | infobox |
| 421 | Byzantine calendar | 5929–5930 | 1.00 | infobox |
| 421 | Chinese calendar | 庚申年 (Metal Monkey) 3118 or 2911 — to — 辛酉年 (Metal Rooster) 3119 or 2912 | 1.00 | infobox |
| 421 | Coptic calendar | 137–138 | 1.00 | infobox |
| 421 | Discordian calendar | 1587 | 1.00 | infobox |
| 421 | Ethiopian calendar | 413–414 | 1.00 | infobox |
| 421 | Gregorian calendar | 421 CDXXI | 1.00 | infobox |
| 421 | Hebrew calendar | 4181–4182 | 1.00 | infobox |
| 421 | Holocene calendar | 10421 | 1.00 | infobox |
| 421 | Iranian calendar | 201 BP – 200 BP | 1.00 | infobox |
| 421 | Islamic calendar | 207 BH – 206 BH | 1.00 | infobox |
| 421 | Javanese calendar | 305–306 | 1.00 | infobox |
| 421 | Julian calendar | 421 CDXXI | 1.00 | infobox |
| 421 | Korean calendar | 2754 | 1.00 | infobox |
| 421 | Minguo calendar | 1491 before ROC 民前1491年 | 1.00 | infobox |
| 421 | Nanakshahi calendar | −1047 | 1.00 | infobox |
| 421 | Seleucid era | 732/733 AG | 1.00 | infobox |
| 421 | Thai solar calendar | 963–964 | 1.00 | infobox |
| 421 | Tibetan calendar | ལྕགས་ཕོ་སྤྲེ་ལོ་ (male Iron-Monkey) 547 or 166 or −606 — to — ལྕགས་མོ་བྱ་ལོ་ (female Iron-Bird) 548 or 167 or −605 | 1.00 | infobox |
These clusters group vocabulary that occurs around closely connected concepts in the source material.
Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.