# Pius IV

> pope of the Catholic Church from 1559 to 1565

**Wikidata**: [Q161983](https://www.wikidata.org/wiki/Q161983)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Pope_Pius_IV)  
**Source**: https://4ort.xyz/entity/pius-iv

## Summary
Pius IV, born Giovanni Angelo Medici, served as the Pope of the Catholic Church and the sovereign ruler of the Papal States from 1559 until his death in 1565. A member of the clergy holding the roles of Catholic priest and bishop, he governed the Church's territories in central Italy during a period defined by the Papal States' status as a major sovereign power.

## Biography
- **Born:** March 31, 1499
- **Nationality:** Papal States
- **Education:** University of Bologna, University of Padua
- **Known for:** Serving as Pope of the Catholic Church from 1559 to 1565 and overseeing the Papal States
- **Employer(s):** Catholic Church
- **Field(s):** Religion, Theology, State Governance

## Contributions
Pius IV's tenure as Pope was marked by the oversight and establishment of significant architectural and institutional projects within the Papal States. In 1565, he was associated with the construction of **Porta Pia**, a notable building located in Castro Pretorio, Italy. He is also connected to the **Casina Pio IV**, which was established in 1558 and serves as the seat of the Pontifical Academy of Sciences. Additionally, the **Santa Maria degli Angeli e dei Martiri**, a Titular Church of the Catholic Church, was established on May 15, 1565, during his pontificate. As the ruler of the Papal States, he managed the temporal sovereignty of the Church, maintaining the state's governance over territories in the Apennine Peninsula and overseeing its administrative and economic systems, including the use of the Roman scudo as currency.

## FAQs
**When did Pius IV serve as Pope, and what was his birth name?**
Pius IV served as Pope from 1559 to 1565. He was born Giovanni Angelo Medici, which is also recorded as Gian Angelo de' Medici.

**Where did Pius IV receive his education?**
He received his education at two prestigious Italian institutions: the University of Padua and the University of Bologna.

**What architectural projects are associated with Pius IV?**
Several key structures are linked to his reign, including Porta Pia (inception 1565), the Casina Pio IV (inception 1558), and the Titular Church of Santa Maria degli Angeli e dei Martiri (established May 15, 1565).

**What territories did Pius IV govern?**
As Pope, he governed the Papal States, a sovereign state and confessional state that encompassed territories mostly in the Apennine Peninsula, including Rome and much of central Italy.

**What was the role of the Pope during Pius IV's time regarding the Papal States?**
The Pope served as the absolute authority of the Papal States, functioning as both a spiritual leader and a temporal ruler who managed the state's legal system, currency, and diplomatic relations.

## Why They Matter
Pius IV matters as the head of the Catholic Church during a specific window of the Papal States' over 1,100-year history, representing the continuation of theocratic governance in central Italy. His reign contributed to the architectural and institutional legacy of Rome through the construction of Porta Pia and the establishment of the Casina Pio IV, the latter of which remains a significant center for scientific inquiry as the seat of the Pontifical Academy of Sciences. His leadership maintained the complex political and administrative structure of the Papal States, a sovereign entity that played a pivotal role in European politics and culture until its dissolution in 1870.

## Notable For
- Serving as Pope of the Catholic Church from 1559 to 1565.
- Birth name: Giovanni Angelo Medici (also known as Gian Angelo de' Medici).
- Education at the University of Padua and the University of Bologna.
- Association with the construction of Porta Pia in 1565.
- Establishment of the Casina Pio IV in 1558, now the seat of the Pontifical Academy of Sciences.
- Establishment of the Santa Maria degli Angeli e dei Martiri on May 15, 1565.
- Citizenship in the Papal States.
- Holding the occupations of Catholic priest and Catholic bishop.

## Body

### Early Life and Education
Born Giovanni Angelo Medici on March 31, 1499, Pius IV was a citizen of the Papal States. He pursued higher education at two of the oldest and most prestigious universities in Europe: the University of Padua, founded in 1222, and the University of Bologna, established in 1088. This academic background placed him within a network of notable scholars and institutions that were central to European intellectual life.

### Pontificate and Religious Roles
Pius IV was ordained as a Catholic priest and Catholic bishop before ascending to the papacy. He adopted the regnal name Pius IV and served as the head of the Catholic Church from 1559 until his death on December 9, 1565. His leadership occurred during the Renaissance and Baroque periods, a time when the Papal States were heavily involved in the political and artistic affairs of Europe.

### Governance of the Papal States
As Pope, Pius IV was the sovereign ruler of the Papal States, a confessional state and sovereign entity that existed from 754 to 1870. The Papal States covered territories mostly in the Apennine Peninsula, encompassing much of central Italy, including regions that are now part of Lazio, Emilia-Romagna, Marche, Umbria, and parts of Tuscany. The capital of his domain was Rome.

During his reign, the state utilized the Roman scudo as its currency. The Papal States operated under a unique model of governance that combined religious authority with temporal power, maintaining its own legal system based on canon law and sophisticated diplomatic protocols. The state was known for its patronage of the arts and its complex political evolution, having survived various European conflicts and periods of foreign occupation.

### Architectural and Institutional Legacy
Pius IV's reign is notably marked by the development of specific architectural and religious sites in Rome:

*   **Porta Pia:** Inception in 1565, this building is located in Castro Pretorio, Italy. It represents a significant architectural addition to the city's fortifications and infrastructure during his final year.
*   **Casina Pio IV:** Established in 1558, this structure serves as the seat of the Pontifical Academy of Sciences. It stands as a testament to the papal commitment to scientific and intellectual advancement.
*   **Santa Maria degli Angeli e dei Martiri:** This Titular Church of the Catholic Church was established on May 15, 1565, adding to the religious landscape of the Papal States.

### Context of the Papal States
The entity governed by Pius IV was the longest continuous theocratic state in European history. At its peak, the Papal States encompassed approximately 41,407 to 44,000 square kilometers. The state was dissolved on September 20, 1870, during the Italian unification process, but during Pius IV's time, it was a powerful sovereign entity with its own military, including units like the Palatine Guard, and a complex administrative system involving various congregations and legations. The Pope's role as the head of this state required balancing spiritual leadership with the temporal responsibilities of ruling a vast territory.

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