A House of worship (or more commonly called, a "Temple") is a building which expands its host city's influence on national borders, and also improves the host city's ability to defend itself. A house of worship also serves to conduct religion and taxation research, and also recruits low-level chivalric order units for Christian factions.
For Muslims, the House of worship is also the recruitment site of some of its best units, but only if a certain type of government was chosen.
Units trained[]
"Chivalric orders":
Islamic units:
Upgrades[]
Taxation 
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Although caravans passing along trade routes can collect wealth, tax however is the main way by which you can enrich your coffers with wealth.
Tax ensures that you can collect money from any active economic activity which goes on in your realm, as well from the percentage of territory you control on the map.
Vassalage[]
Selling the right to lord it all over others can be a lucrative business.
- Initiates taxation at level 1
- Enables collection of wealth from farms (increases existing wealth from Moorish farms)
- Increases income from merchants, fishing vessels
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Scutage[]
To be rich is to be patriotic, for much wealth engenders much power in times of war.
- Increases taxation at level 2
- Increases income from merchants, fishing vessels and farms
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Customs and excise[]
Foreign trade is useful to the nation, especially when the king gets a share of the small take.
- Increases taxation at level 3
- Increases income from merchants, fishing vessels and farms
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Note: Level 4 is attainable only with Centralisation.
Religion[]
Monotheism[]
"I would seek unto God, and unto God would I commit my cause."
—Job (5:8)
- National Borders increased by +4 strength.
- City Combat Range +2.
- City Hitpoints increased by 50%.
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Organised religion[]
"Rules of ceremony are the embodied expression of what is right."
—Confucius, Book of Rites (9:29)
- National Borders increased by +6 strength.
- City Combat Range +3.
- City Hitpoints increased by 100%.
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Asceticism[]
The cloister often appeals greatly as a refuge to those worn out by the rigours of secular life.
- National Borders increased by +9 strength.
- City Combat Range +4.
- City Hitpoints increased by 150%.
| Cost | Requirements | Leads to |
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Muslim religious research[]
The House of Worship plays host to Five Pillars, one of the two Muslim unique technologies. Five Pillars is required for Muslims to access a variety of unique units, technologies and wonders.
Trivia[]
Five Pillars is available to the Chagatai faction in Renovatio Europam. To conterbalance it, the Chagatai however are not allowed to build any naval unit other than a Dromond until the Imperial Era is reached.