Spoiler 1838 AD T289, Monarch :
To recap, I met Mansa Musa and built some wonders. I used the Great Wall to teleport a barb Archer toward Musa; the barb pillaged Musa's wheat and horse. My wonders so far are the Great Wall (T68), Pyramids (T71), Hanging Gardens (T96), Great Library (T125), Parthenon (T127), Sistine Chapel (T132), Angkor Wat (T164), Spiral Minaret (T171), University of Sankore (T177), Versailles (T197), Taj Mahal (T198). These are in my 3 wonderful cities of Fertile Land, Iris's Rainbow, and Green Water. I want a Cultural Victory.
Because of the Taj Mahal, I enter my 1st golden age in 1380 AD T198, so I can change civics without anarchy. I have been using Slavery and Organized Religion to build wonders, but I have no more world wonders to build, until I learn Democracy and begin the Statue of Libery; so I adopt Caste System and Pacifism in the 1st turn of my golden age, and revert to Slavery and Organized Religion in the 8th and last golden turn. This is unusal for me; I don't recall ever using Pacifism in any previous game.
I am once again refusing to adopt Bureaucracy (to boost my capital). In my recent games, my capital was too weak, or I had too many cities, so I avoided Bureaucracy and preferred Vassalage or Nationhood. In this game, I have a great capital, and I want Bureaucracy, but I had learned Liberalism (Free Speech) and Civil Service (Bureaucracy) on the same turn, so I am skipping Bureaucracy to adopt Free Speech (to boost culture) in the 1st golden turn, and staying in Free Speech after the golden age.
I also learned Printing Press in T198, so each town-from-cottage gets extra commerce from Printing Press and from Free Speech. My capital Fertile Land is without Bureaucracy but has much commerce in a golden age!
I have 3 religions (Confucianism, Taoism, Islam) in my 3 wonderful cities. I want monasteries in the 3 wonderful cities and temples everywhere; I need 9 temples of each religion to put 3 cathedrals in the 3 wonderful cities, but I have exactly 9 cities. I use Caste System to put artists in Iris's Rainbow and merchants in some other cities. After I revert to Slavery, my specialists tend to be priests (Temple, Angkor Wat) or spies (Courthouse).
Pacifism increases great people points. My only new great person during the golden age is a Great Prophet, whom I save for later. My great people before the great age were 3 Great Engineers, 3 Great Scientists, and a Great Spy. I had used all 3 Great Scientists (to make an Academy in Fertile Land, an Academy in Iris's Rainbow, and a specialist in Green Water) and 1 Great Engineer (to hurry the Sistine Chapel). I am holding the other 2 Great Engineers, the Great Spy, and the new Great Prophet. I have more great people than usual because I have so many wonders. Near the end of my golden age, Mansa Musa wins the Great Merchant from Economics (while I miss 3 techs before Economics: Feudalism, Guilds, Banking).
In 1490 AD T209, I learn, "A distant Civilization has circumnavigated the globe!" An unknown civs from another continent must have Optics and a Caravel. Also in T209, Mansa Musa gives his Calendar, Compass, 890 gold, and map for my Nationalism. (It is ironic that I am playing the Roman Empire, and I have so much culture, but I never invented Alphabet nor Calendar; I got them from Mali. In real history, Roman culture is most famous for its alphabet, ABC, and its calendar, July, August, September.) I deduce from Musa's map that he has Optics but hasn't sent out Caravels.
In 1510 AD T212, I meet both Shaka and Brennus. (Shaka says, "The Zulu people always enjoy meeting vulnerable and undefended new civilizations!", which is appropriate, because most of my cities have only a Warrior for defense.) I give Paper to get Optics from Brennus, and Eduction to get Shaka's map. With Optics, I see Brennus's Caravel northeast of Mercuria. Brennus is a vassal of Shaka. From Shaka's map, I see all of the other continents. I learn that Shrine Guy is Indian, with his 3 holy shrines in Delhi. India founded 4 religions on an isolated continent. The other 3 religions are on my continent.
The big continent with Shaka's Zululand, Brennus's Celtia, China, and the Netherlands has almost no religion: I only see Buddhism in Dutch Nijmegen (and I suspect that India put a Buddhist Missionary on a Caravel). Shaka is Oracle Guy; he has the largest civ, so I put all my espionage points on him. One turn later, I meet Mao Zedong of China (as his Caravel reaches me). Around this time, I use a new Great Scientist to make an Academy in Green Water, and I spend a Great Engineer toward the Statue of Liberty.
In 1550 AD T220, I learn Astronomy, and my Caravel meets Ghandi of India and Willem van Orange of the Netherlands. I have open borders with everyone; Astronomy connects my foreign trade routes. If I want a war, I would attack Ghandi, who has the least techs; but I want peace, because I have a path from Astronomy, through Scientific Method, Physics, Radio, to Mass Media, to unlock the last big group of wonders.
Now that I have trade routes with India, I settle 3 more cities in 1550 AD T220: Oceanus Falls (10th, north of Fertile Land), Twilight Woods (11th, east of Vulcan), Talos's Abyss (12th, south of Demeter Forest). These cities have no religion, so they might get a random religion. If I get lucky, a religion will come from India, so I will have another religion toward my Cultural Victory. The city count is now 12 for me, 16 for Shaka, 12 for Mao, 10 for Ghandi, 5 for Willem, 3 for Musa, 5 for Brennus; but Shaka and Mao are in Mercantilism, so there are only 10 + 5 + 3 + 5 = 23 foreign cities for trade. I have 24 trade routes, so I see 1 domestic route in Talos's Abyss. My 3 new cities get Hinduism (Talos's Abyss, 1575 AD T225), Taoism (Twilight Woods, 1590 AD T228), Taoism (Oceanus Falls, 1595 AD T229). Hinduism is the only lucky religion.
I trade techs until I receive Economics (Free Market), then Engineering, both in 1590 AD T228. (So Engineering unlocks Castles just after Economics obsolete Castles!). In T229, I whip the slaves for the Statue of Liberty, and spend my Great Spy on my 2nd golden age, so I can adopt Free Market. I again use Caste System and Pacifism during the golden age. I also use my Great Prophet to complete the Dai Miao (Vulcan, Taoist holy city, 1595 AD T229). During this golden age, I complete the Statue of Liberty (Iris's Rainbow, 1600 AD T230), complete my National Epic (Fertile Land, 1615 AD T233), win the Great Scientist from Physics (1620 AD T234), get a new Great Engineer (T234), and accept Mansa Musa as my vassal (1630 AD T236). I also agree to help Ghandi by giving Printing Press in T234.
Ghandi loses his peaceful reputation by saying, "I will sacrifice fifty warriors in honor of your friendship!" Ghandi is standing in front of the Taj Mahal, which is in my capital. Nice of him to visit!
After the golden age, I complete my only Forum (Roman unique Marketplace) in Fertile Land (1635 AD T237). A Forum boosts great people points, but I didn't build it earlier, because it doesn't help with culture. I also don't have the resources to get happy faces from a Forum. I soon complete my only Custom House in Demeter Forest, but stop building Forums and Custom Houses so I can build Wealth and spread Hinduism.
The big continent gets distracted by war; Mao has conquered Amsterdam from Willem, but Willem has become Shaka's vassal, so Shaka (and his other vassal Brennus) have joined Willem against Mao. This leaves no civ to stop my Cultural Victory (unless Ghandi would invade my civ, because he likes to sacrifice warriors and visit the Taj Mahal). I complete my national Globe Theatre (Iris's Rainbow, 1680 AD T246) and my national Oxford University (Fertile Land, 1690 AD T248). Several things happen in 1725 AD T255: I learn Radio (and enter the modern era), spend a Great Prophet to build the Masjid al-Haram (Mercuria, Islamic holy city), and spend a Great Engineer and a Great Scientist on my 3rd golden age. I stay in Slavery and Organized Religion to build wonders. I complete Broadway (Green Water, 1740 AD T258) and the Kremlin (Demeter Forest, 1745 AD T259).
After my golden age, I complete the Eiffel Tower (Fertile Land, 1770 AD T264). I get Christianity (1800 AD T270) by luck in Oceanus Falls (where it is the 3rd religion, after Confucianism 2nd and Taoism 1st). I research Biology and Medicine and spend a Great Merchant to found Sid's Sushi (Iris's Rainbow, 1802 AD T271). I import more seafood, drop science from 80% to 0%, and raise culture from 10% to 70% in T271, so I am 89 turns away from a Cultural Victory in T360. I complete Cristo Redentor (Green Water, 1806 AD T273) and use it for an easy switch from Representation to Universal Suffrage. Slaves hurry Rock N Roll before I adopt Caste System (T274) and drop culture to 30% (to get more gold). I complete Rock N Roll (Iris's Rainbow, 1810 AD T275). I settle a Great Prophet in Iris's Rainbow (T277). I complete the United Nations (Demeter Forest, 1822 AD T281), but Shaka wins the UN election (T282). I spend 3729 gold to buy Hollywood, then raise culture to 90%. I complete Hollywood (Iris's Rainbow, 1826 AD T283), my national Hermitage (Green Water, 1830 AD T285), and my national Forbidden Palace (Iris's Rainbow, 1832 AD T286). I have finished all my wonders in this game. My last task is to add more temples and cathedrals to Iris's Rainbow while I run toward a Cultural Victory.
Then Shaka declares war after I end my turn in T288. Shaka conquers my southeastern city, Talos's Abyss.
In 1838 AD T289, I would be 46 turns away from a Culture Victory in T335, but must lower my culture rate to fight this war. Shaka brought a Destroyer and 2 Transports. His 6 Infantry, in an amphibious attack, walked over my 2 fortified Musketmen in Talos's Abyss. He then flew in 4 Airships. Shaka had made peace with Mao. Shaka brings his 2 vassals, Brennus and Willem, into the war; I bring my vassal, Musa; while Mao and Gandhi are neutral.
My emergency plan is to adopt Nationhood. I can draft Riflemen and build Cavalry and Cannons. The question is whether Shaka can win the war before I get my Cultural Victory.