THIS THREAD IS NOW INACTIVE

Hi @iballisticbunny6 I can do that!

Victorian:
http://budgie2budgie.tumblr.com/search/crimson
https://www.thesimsresource.com/themes/victorian/downloads/details/category/sims4-clothing-female-teenadultelder-everyday/title/satin-and-lace-bustle-dress_t.d./id/1334375/
https://www.thesimsresource.com/themes/victorian/downloads/details/category/sims4-clothing-female-teenadultelder-everyday/title/lost-souls-bustledress_t.d./id/1320002/
https://www.thesimsresource.com/members/Lollaleeloo/downloads/details/category/sims4-clothing-female-teenadultelder-everyday/title/everyday-victorian-dress-by-lollaleeloo/id/1315385/
http://modthesims.info/download.php?t=589503

Nightgown and Swimming Costume:
https://www.thesimsresource.com/members/Lollaleeloo/downloads/details/category/sims4-clothing-female-teenadultelder-sleepwear/title/vintage-nightgown-by-lollaleeloo/id/1315944/
https://www.thesimsresource.com/members/Lollaleeloo/downloads/details/category/sims4-clothing-female-teenadultelder-swimwear/title/victorian-swimsuit-for-sim-ladies-by-lollaleeloo/id/1315797/

Hat:
http://historicalsimslife.blogspot.com/2016/12/ts4-victorian-womens-hat.html

Victorian updo:
http://giannisk-13.tumblr.com/post/156458769672
http://historicalsimslife.blogspot.fi/2017/01/ts4-berenice-hair.html

1400's:
http://sims4studio.com/thread/3936/wiccans-wares I'm not sure if you need to be a member to download but, it's free if you do! Be sure to scroll all the way to the bottom of the page for all the dress options. (Page 2 has children's dresses and at the bottom of page 3 are toddlers.)
http://mystufforigin.blogspot.pt/2015/04/gwynimean-maxis-af-conversion.html
http://mystufforigin.blogspot.com/2014/10/widow-dress-conversion.html
http://mystufforigin.blogspot.pt/2014/10/vampire-dress.html
http://mystufforigin.blogspot.pt/2015/03/aleeras-gown.html
http://modthesims.info/download.php?t=541527
http://modthesims.info/download.php?t=545638
http://ts4medievalfantasy.tumblr.com/post/111373893815/fantasy-dresses-conversions-oc

These hairs may be more appropriate for 1400's princesses:
http://mythicaldreamssims.blogspot.com/2017/01/medieval-long-hair-with-buns-metallic-and-hairnet-accessories.html
http://mystufforigin.blogspot.pt/2015/04/sensitive-hair.html

Incredible resource for Historical Dresses:
https://www.pinterest.com/melLizanda/sims4-18-century-victorian-era/