Working through the tech tree:
Animal Husbandry : Trade route caravan and an upgrade
Sailing : Trade route galley and an upgrade
Horseback Riding : Caravansary?
Drama and Poetry : Parthenon and another building, should not be Temple of Artemis since it is already in G&K
Engineering : An upgrade
Theology : Borobudur
Guilds : Loses National Treasury, gets two buildings (seems to be to early for East India Company)
Compass : Two upgrades
Chivalry : Probably Kasbah as a worker task
Acoustics : One building and an upgrade
Banking : An upgrade
Printing Press : Zoo replaces Theatre, adds Globe Theatre and an upgrade
Architecture : Uffizi
Metallurgy : Loses Kremlin, get an upgrade
Archaeology : Archaeologist, Louvre and Archaeologist Dig ability
Biology : An upgrade, probably an additional Trade Router per Well-of-Souls
Refrigeration : Hotel and an upgrade
Radio : Broadway, plus enables World Ideology
Flight : A building (airport?) and an upgrade
Railroad : Kremlin and an upgrade
Combustion : An upgrade
Penicillin : An upgrade
Radar : A building (possibly Airport or UN)
Nuclear Fission : A building (Possibly UN or Internet)
Telecommunications : A building, probably Internet
Globalization : Loses UN, which may not appear elsewhere and has a different of getting it built
Nanotechnology : X-Com unit
Interesting that there are a large number of upgrades to units etc.