Learn who founded the Iglesia Filipina Independiente (IFI), why it was created in 1902, and how it developed. This evidence-based blog article uses primary sources, scholarly studies, Patristic/Scriptural context, and official documents to explain the IFI’s origins, theology, and later developments.
Quick answer (one paragraph)
The Iglesia Filipina Independiente (IFI) was publicly proclaimed on 3 August 1902 by nationalist labor leader Isabelo de los Reyes with assistance from the Unión Obrera Democrática; the movement then installed Gregorio Aglipay (an excommunicated Roman Catholic priest and former revolutionary chaplain) as the church’s first Obispo Máximo (Supreme Bishop) in September 1902. The IFI arose as a nationalist, anti-friar, and reform movement seeking Filipino ecclesial independence from Spanish clerical control; it later developed its own liturgy, governance, and—after 1948—an Anglican line of apostolic succession through the Episcopal Church (USA). Wikipedia+2Wikipedia+2
Why it matters
The IFI is a major, uniquely Filipino Christian body whose origin connects religion, nationalism, social reform, and anti-colonial politics. Understanding its founding explains many contemporary Filipino religious and political dynamics (land, parish control, vernacular worship, clerical marriage, and ecumenical relations). Encyclopedia Britannica+1
1) Who actually founded the IFI? — short list
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Proclaimer / lay founder: Isabelo de los Reyes (announced/organized the movement, led the Unión Obrera Democrática and nationalist circles that created the IFI). Wikipedia+1 
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First head (installed leader / bishop): Gregorio Aglipay — accepted the leadership in September 1902 and became the first Obispo Máximo; he had been a Roman Catholic priest who was earlier excommunicated and who also served as a revolutionary chaplain. Wikipedia 
How to read that distinction: Isabelo de los Reyes provided the political/organizational initiative and public proclamation (the lay, nationalist foundation). Aglipay provided clerical legitimacy and episcopal leadership when he accepted the role; both men are therefore essential founders in different senses. Wikipedia+1
2) Historical context and main reasons for establishment
Short context: The IFI formed in the immediate aftermath of the Philippine Revolution and the Philippine–American War (late 1890s–early 1900s). Spanish friars had dominant control of parishes under colonial rule; many Filipino secular (native) clergy complained about discrimination, lack of promotion, and abuses. The overthrow of Spanish civil rule (and the end of Spanish ecclesiastical monopolies) created a political opening for a nationalist church. Encyclopedia Britannica+1
Key motives and reasons (summarized):
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Nationalism / anti-colonial reaction: leaders wanted a Church free from foreign (Spanish) clerical control and aligned with Filipino national identity. Encyclopedia Britannica 
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Anti-friar grievances: concrete complaints about the Spanish religious orders’ economic and political power, mismanagement of parish resources, and perceived spiritual abuses. Wikipedia 
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Social & labor activism overlap: Isabelo de los Reyes was a labor leader (Unión Obrera Democrática) and used his networks to organize and publicize the new Church. stories.workingclasshistory.com 
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Religious reform (clergy practice & governance): abolition of compulsory celibacy for priests, rejection of papal jurisdiction and infallibility in governance, vernacular worship, and local control of parishes were central demands. Wikipedia+1 
Representative primary sentiment (quote attributed to de los Reyes):
“Enough of Rome! Let us now form without vacillation our own congregation, conserving all that is good in the Roman Church and eliminating… the deceptions… introduced to corrupt…” — Isabelo de los Reyes. Wikipedia
3) Founding timeline (visual / quick timeline)
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1898–1901: Revolution & Philippine–American conflict; Filipino clergy and lay nationalists push for reforms. Encyclopedia Britannica 
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Feb 1902: Unión Obrera Democrática activity (labor organization under de los Reyes), building nationalist networks. stories.workingclasshistory.com 
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3 Aug 1902: Isabelo de los Reyes publicly proclaims the establishment of the Iglesia Filipina Independiente in Quiapo, Manila. Wikipedia+1 
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6 Sept 1902: Gregorio Aglipay accepts appointment and is installed as the first Obispo Máximo (Supreme Bishop). Wikipedia 
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1903–1906: Early constitutional documents (Doctrina y Reglas Constitucionales adopted 1903), legal conflicts over church property, and doctrinal experiments. Supreme Court rulings later returned many occupied church buildings to the Roman Catholic Church. Wikipedia+1 
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1905–1910s: Internal doctrinal debates; some leaders (including de los Reyes and Aglipay in certain periods) experimented with Unitarian or rationalist theology (this led to tensions; many IFI members remained Trinitarian). Wikipedia 
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7 Apr 1948: Anglican/Episcopal lines of apostolic succession were conferred on IFI bishops (episcopal consecrations) through relations with the Episcopal Church (USA) — an important step for IFI’s claims to historic episcopacy. Later, formal concordats / full-communion agreements deepened ecumenical ties (e.g., concordat with The Episcopal Church in the 20th century). Wikipedia+1 
  
4) How did the IFI differ from Roman Catholicism at foundation? (comparison table)
| Topic | Roman Catholic Church (typical 1900s) | IFI (early positions) | 
|---|---|---|
| Authority | Papal jurisdiction, Roman hierarchy | Reject papal infallibility/jurisdiction; national church governing itself. Vatican+1 | 
| Clerical celibacy | Latin-rite celibacy for priests | Abolished compulsory celibacy — married clergy allowed. Wikipedia | 
| Parish control & property | Under religious orders and diocesan bishops (often Spanish friars) | Local control aimed at Filipino clergy/lay committees; led to legal conflicts over buildings. Wikipedia | 
| Liturgy | Tridentine Latin rite predominates | Reformed liturgy early on; vernacular and simplified rites were used. Wikipedia | 
| Theology (early) | Trinitarian, Catholic dogma | Originally largely Trinitarian, but some leaders adopted Unitarian/rationalist positions c.1907 causing tensions. Wikipedia | 
| Apostolic succession | Roman Catholic sacramental succession claim | Claimed continuity but later sought and received Anglican/Episcopal lines of succession (1948 onward). Wikipedia+1 | 
5) Development & evolution (major phases)
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Nationalist founding (1902–1907): political/anti-friar impetus; mass conversions in some areas; legal battles over property. Wikipedia+1 
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Doctrinal experimentation and internal conflict (c.1907–1920s): some leaders promoted Unitarian and rationalist theology; many members resisted these changes; leadership tensions followed. Wikipedia 
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Institutional consolidation & ecumenical turn (1920s–1948): creation of constitutions, liturgical books, seminary training; later ecumenical outreach led to Anglican/Episcopal consecrations for apostolic succession in 1948. Wikipedia+1 
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Modern IFI (post-1948): the IFI is ecumenically active, in full communion/close relations with parts of the Anglican Communion and some Old Catholic bodies; it claims a national identity and continues to emphasize social justice and Filipino heritage. episcopalchurch.org+1 
6) How do Catholic sources and classic Christian texts relate to this story?
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Biblical/Patristic background: Catholic teaching (for instance the Catechism’s sections on the Church) emphasizes the Church’s unity, apostolicity, and hierarchical continuity (“one, holy, catholic, and apostolic”). From the Roman Catholic perspective, national schisms raise ecclesiological questions about unity and apostolic continuity. For a concise stating of those Catholic doctrinal claims see the Catechism (e.g., article on “The Church is one, holy, catholic, and apostolic”). Vatican 
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Early Church Fathers / Apostolic tradition: debates about episcopal authority and apostolic succession are ancient. The IFI’s later pursuit of Anglican/Old Catholic lines of succession (mid-20th century) can be read as an attempt to secure an historically recognizable episcopal order similar to the classical apostolic pattern. Wikipedia+1 
7) Representative primary & scholarly sources (for further reading)
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Britannica — Philippine Independent Church (history & context). Encyclopedia Britannica 
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IFI historical pages / diocesan histories (official and local accounts). Diocese of Greater Manila Area 
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Gregorio Aglipay — biography and role (overview). Wikipedia 
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Isabelo de los Reyes — biography & writings (including the quoted proclamation). Wikipedia 
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JSTOR / academic articles on the IFI’s founding and social setting (e.g., F.S. Go, and studies cited in academic journals). JSTOR 
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Episcopal Church (USA) documents on concordat / full communion with the IFI (ecumenical agreements, 20th century). episcopalchurch.org 
8) Quick FAQ (apologetic/clarifying style)
Q: Was the IFI a Protestant church from the start?
A: Not exactly. Early IFI worship kept many Catholic forms; the movement was better described as an independent national Catholic tradition with reformist impulses. Over time it incorporated elements from Protestant and Anglican practice and—especially after 1948—developed clear links to Anglican/Episcopal traditions. Wikipedia+1
Q: Who gets credit as “founder” — Aglipay or de los Reyes?
A: Both — de los Reyes initiated and publicly proclaimed the Filipino national church; Aglipay provided episcopal leadership and public religious authority. Historians therefore speak of the movement’s founders as a partnership between secular nationalist leadership and dissident clergy. Wikipedia+1
Q: Did the IFI keep the Mass and sacraments?
A: Early IFI worship reformed the Tridentine rite (vernacular use), retained many sacramental elements, but later doctrinal variations (including Unitarian experiments among leaders) produced internal conflicts. Over time the IFI consolidated a sacramental identity, especially after ecumenical engagements. Wikipedia
Sources cited (key web references)
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Encyclopedia Britannica — Philippine Independent Church. Encyclopedia Britannica 
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Wikipedia — Philippine Independent Church (history summary; references within). Wikipedia 
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Wikipedia — Gregorio Aglipay (biography). Wikipedia 
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Isabelo de los Reyes — biography & writings (founding proclamation). Wikipedia 
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Episcopal Church (USA) ecumenical page — concordat / full communion notes. episcopalchurch.org 
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JSTOR / academic article references on IFI founding and development. JSTOR 
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Catechism of the Catholic Church — on the nature of the Church (for comparative theological context). Vatican 
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