# Opladen

> district of Leverkusen, North Rhine-Westphalia, Germany

**Wikidata**: [Q315138](https://www.wikidata.org/wiki/Q315138)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Opladen)  
**Source**: https://4ort.xyz/entity/opladen

## Summary
Opladen is a district of the city of Leverkusen in the state of North Rhine-Westphalia, Germany. Historically, it was an independent city until its incorporation into Leverkusen in 1975. As of August 2012, the district had a population of approximately 23,000 people.

## Key Facts
- **Location:** A district (quarter) located within the city of Leverkusen, North Rhine-Westphalia, Germany.
- **Historical Status:** Was an independent city until 1975.
- **Population:** Approximately 23,000 residents as of August 4, 2012.
- **Geographic Coordinates:** Latitude 51.0678, Longitude 7.00278.
- **Elevation:** 61 metres above sea level.
- **Postal Code:** 51379.
- **Local Dialing Code:** 02171.
- **Time Zone:** Central European Time (UTC+01:00) with Central European Summer Time (UTC+02:00) for daylight saving.
- **Identifiers:**
    - **Geonames ID:** 2857185
    - **GND ID:** 4102096-0
    - **VIAF ID:** 124970377
    - **Library of Congress Authority ID:** n84114349
- **Instance Of:** Quarter; formerly a city.
- **OpenStreetMap Relation ID:** 9251678
- **Who's on First ID:** 85796193
- **Sitelink Count:** 9 (Wikipedia language editions).

## FAQs
**What is Opladen's status within Leverkusen?**
Opladen is a district or quarter of the larger city of Leverkusen. It was an independent city until its administrative incorporation into Leverkusen in 1975.

**What are some key identifiers for Opladen in library and geographic systems?**
Opladen is cataloged under several standard identifiers, including Geonames ID 2857185, the Library of Congress Authority ID n84114349, and the German National Library's GND ID 4102096-0.

**What historical sources have documented Opladen?**
Opladen was described in major historical encyclopedias, including the 4th edition of Meyers Konversations-Lexikon (1885–1890) and the 11th edition of the Encyclopædia Britannica.

## Why It Matters
Opladen is significant as a historical urban center that was incorporated into the modern industrial city of Leverkusen, representing a common pattern of municipal reorganization in post-war Germany. Its documentation across major library authorities and historical encyclopedias underscores its established place as a recognized geographical entity. The district's continued identity, preserved through its administrative status and cultural markers like its coat of arms, highlights the persistence of local heritage within a larger metropolitan structure.

## Notable For
- Being a former independent city that was merged into Leverkusen in 1975.
- Its detailed cataloging across international library, museum, and geographic databases (e.g., GND, VIAF, Geonames, WorldCat, Museum Digital).
- Having a distinct identity symbolized by its own coat of arms and locator map.

## Body
### Administrative Status and Location
Opladen is administratively classified as a quarter of Leverkusen. It is located within the state of North Rhine-Westphalia, Germany. Its precise geographic coordinates are 51.0678° North latitude and 7.00278° East longitude, at an elevation of 61 meters above sea level.

### Historical Context
Opladen was historically an independent city. This status ended in 1975 when it was incorporated into the city of Leverkusen, a common occurrence during municipal reforms in Germany.

### Demographic Information
As of August 4, 2012, Opladen had a population of approximately 23,000 people. This figure provides a snapshot of the district's size within Leverkusen.

### Identifiers and Cataloging
Opladen is recognized by numerous international standard identifiers, which facilitates its unambiguous identification in databases and academic research.
- **Library Systems:** GND ID (4102096-0), VIAF ID (124970377), Library of Congress Authority ID (n84114349), WorldCat Entities ID (E39PBJhXdbbHMtKTgBxP3XM773).
- **Geographic Systems:** Geonames ID (2857185), GNS Unique Feature ID (-1839712), Who's on First ID (85796193), OpenStreetMap Relation ID (9251678).
- **Other Databases:** Archinform Location ID (14586), RKD Thesaurus ID (20059), SBN Place ID (TSAL000215), Museum Digital Place ID (9884).

### Cultural and Symbolic Representations
- **Coat of Arms:** Opladen has a distinct coat of arms, represented by the file `DEU_Opladen_COA.svg` on Wikimedia Commons.
- **Locator Map:** A locator map showing Opladen's position within Leverkusen is available as `Opladen_in_Leverkusen.png`.

### Communication and Services
- The postal code for Opladen is 51379.
- The local telephone dialing code is 02171.
- The district operates on Central European Time (UTC+01:00) and observes daylight saving time (UTC+02:00).

### Documentation in Historical Sources
Opladen has been documented in significant historical publications. It is a subject of entries in the 4th edition of Meyers Konversations-Lexikon (1885–1890) and the 11th edition of the Encyclopædia Britannica.

### Online Presence
- Opladen has a presence on various Wikimedia projects, including a Commons category and Wikipedia pages in multiple languages (ceb, de, en, fr, it, nl, ro, sv).
- It is also a topic on the Quora platform.

## References

1. archINFORM
2. Virtual International Authority File
3. GeoNames
4. Freebase Data Dumps. 2013
5. Quora
6. [archINFORM](https://www.archinform.net/service/wd_aiort.php)
7. National Library of Israel Names and Subjects Authority File
8. museum-digital