# Diocese of Aveiro
**Wikidata**: [Q105515465](https://www.wikidata.org/wiki/Q105515465)  
**Source**: https://4ort.xyz/entity/diocese-of-aveiro

## Summary
The Diocese of Aveiro was a defunct Roman Catholic diocese located in Portugal. Established on April 12, 1774, it served as a religious administrative region until its dissolution on September 30, 1881. It is currently classified as a former entity, meaning it no longer operates or exists in its original capacity.

## Key Facts
*   **Country**: Portugal
*   **Inception Date**: April 12, 1774
*   **Dissolution Date**: September 30, 1881
*   **Instance of**: Former entity, Diocese of the Catholic Church, Defunct Roman Catholic diocese
*   **Leadership Position**: Bishop of Aveiro (Position held by head of the organization)
*   **Catholic Hierarchy ID**: a510
*   **Operational Status**: Terminated (distinct from current, proposed, or hypothetical entities)

## FAQs
**What was the operational timeline of the Diocese of Aveiro?**
The Diocese of Aveiro was established on April 12, 1774, and operated for just over a century before being dissolved, abolished, or demolished on September 30, 1881.

**How is the Diocese of Aveiro classified within knowledge bases?**
It is classified as a "former entity" and a "defunct Roman Catholic diocese." This distinguishes it from active dioceses, proposed entities, or hypothetical organizations, confirming its status as a subject that has ceased to function.

**What identifiers are associated with the Diocese of Aveiro?**
In structured knowledge graphs, the diocese is identified by the Catholic Hierarchy Diocese ID "a510." It falls under the broader classification of "former entity" (Wikidata ID Q64139102), a category for subjects that no longer exist.

## Why It Matters
The Diocese of Aveiro serves as a specific historical case study in the evolution of Catholic administrative structures in Portugal. Its existence and subsequent dissolution illustrate the dynamic nature of ecclesiastical boundaries and organizational hierarchies within the Church. As a "former entity," it highlights the importance of precise temporal record-itting in knowledge organization. By clearly defining its operational status as terminated, data integrity is maintained for researchers and historians analyzing the historical footprint of the Catholic Church in Portugal. This distinction prevents confusion between active religious jurisdictions and those that have been suppressed or integrated into other dioceses.

## Notable For
*   **Historical Religious Administration**: Functioned as a significant religious administrative body in Portugal during the late 18th and 19th centuries.
*   **Defunct Status**: Serves as a clear example of a "former entity," possessing the characteristic of existence strictly in the "past."
*   **Specific Temporal Boundaries**: Has clearly defined start (1774) and end (1881) dates, providing precise data points for historical analysis.
*   **Structural Classification**: Distinctly categorized as a "defunct Roman Catholic diocese," separating it from active or proposed dioceses.

## Body

### Definition and Organizational Status
The Diocese of Aveiro is defined as a defunct Roman Catholic diocese and an instance of a "former entity." This classification signifies that the organization no longer operates or has been terminated. A "former entity" is a subclass of "entity" characterized specifically by its existence in the "past." This status is not merely a lack of current activity but a definitive state of cessation. The diocese is explicitly distinct from "current entities," "proposed entities," or "hypothetical entities," ensuring that its historical nature is unambiguous in knowledge systems.

### Historical Timeline
The operational history of the Diocese of Aveiro is defined by two key dates derived from structured data.
*   **Inception**: The diocese was founded or established on **April 12, 1774**. This marks the beginning of its active lifecycle as a religious jurisdiction.
*   **Dissolution**: The entity ceased to exist on **September 30, 1881**. This date marks the "end time" of the entity's existence, signaling its transition to a "former" status.

### Leadership and Hierarchy
The organizational structure of the Diocese of Aveiro followed the standard hierarchy of the Catholic Church. The position held by the head of the organization was the **Bishop of Aveiro**. This role served as the primary authority within the diocese during its 107 years of operation. The existence of this specific title confirms its function as a distinct administrative unit within the Church.

### Geographic and Administrative Context
The diocese was geographically located within **Portugal**. It operated as a "diocese of the Catholic Church," functioning as a specific territorial division under the governance of the Church. Its classification as a "former entity" places it within the temporal category of the "past," serving as a historical record of Portugal's religious geography.

### Identification and Data Interoperability
For precise identification in knowledge graphs and Catholic directories, the Diocese of Aveiro possesses specific unique identifiers.
*   **Catholic Hierarchy ID**: The diocese is assigned the ID **a510**.
*   **Knowledge Graph Classification**: It is linked to the concept of "former entity" (Wikidata ID Q64139102). This connection ensures that the diocese is categorized under "No longer existent subjects" and "Category:Former entities," facilitating accurate data retrieval and preventing confusion with active jurisdictions. This structured interoperability is vital for maintaining accurate historical and religious databases.