I probably will! I've started doing that when mapping with Mike Schley's overland and city styles.

I forgot about my early mapping influences from fantasy/sci fi literature, prior to discovering D&D. The Lord of the Rings was huge, naturally (I even had Karen Wynn Fonstad's Atlas of Middle Earth). And then the maps from Pern, and The Land from Stephen Donaldson's Thomas Covenant novels.

But I forgot that the earliest for me was the maps from The Wizard of Oz books. I was obsessed with those books from around the ages of 7 to 10. I would draw the map from memory over and over again. I started to do a version in CC3 but got distracted by other projects. (The map is now in public domain so no copyright infringement!)

Around the same time, while our teacher was reading stories to us, I would doodle side-view maps of underground mansions inspired by an illustration from the children's book Babar and Father Christmas, which you can see on the bottom of this page:

https://imaginaryelevators.blog/2021/12/21/babar-je-taime/

Here's a first pass at the first floor of the main villa. There's more work to be done (like windows, and maybe furniture), but in the meantime, I wanted to solicit feedback on what types of rooms I'm missing. As this is a fantasy world, I'm absolutely fine blurring the lines on what would be strictly Roman, and mixing in things that would be more medieval or fantasy.

Also, bear in mind that this is just the ground floor. The basement will include a larder, wine cellar, and access to the sewers. The upper floors will have bedroom suites overlooking the courtyard. I plan to have a library on the upper floor of the baths next door.

Here's the description for the numbered labels:

1. Fortification Walls (not shown here)
2. Gatehouse (not shown here)
3. Portico - Covered porch
4. Vestibulum - entry to Atrium
5. Atrium - The central hall, where guests were greeted and the family's household gods were honored. It has an open roof (compluvium) and a rainwater pool (impluvium)
6. Impluvium - Shallow pool that collects rainwater which is then carried by pipes to the kitchen
7. Triclinium - The dining room where guests reclined on couches to eat
8. Tablinum - The office or study of the head of the household, often located between the atrium and peristyle. The floorplans I've seen always show it without doors, so the head of the household can keep an eye on things, but I have chosen to add an enclosed office next to it.
9. Culina - The kitchen
10. Cellarium - The pantry.
11. Lavatrina - Lavatories
12. Horreum - Storage rooms
13. Cubiculum - Bedrooms. I have a lot on this floor, but since the upper floors are intended to be mostly bedrooms, I am very much open to converting some to other uses if you can think of things I should add.
14. Scalae Graecae - Staircases going to second floor. (The term "scalae" referred to a staircase that was open on one side; "scalae graecae" referred staircases with walls on both sides.) You may not be able to see it, but an archway under the stairs going up is meant to lead to stairs going down to the basement.
15. Andron - In ancient Greece, this room was a room for men only, with couches arranged in a U-shape. By Roman times, it could also mean a room that was a passway between sections of the villa. (Open to changing this name if my sources are bogus.) In this villa, it provides access between the atrium, the peristylium, and the colonnade so that folks don't have to pass through the tablinum when it's in use.
16. Alae - My sources about what this is are all over the place. As far as I can tell, they were once used as chambers with windows to allow daylight to the rest of the villa, but this became less important once the compluvium was added to allow light from the sky. They later became used as storage rooms, or as rooms to honor the ancestors. I've decided to go with the "honor the gods and ancestors" meaning.
17. Peristylium - An open-air courtyard, often a garden, located at the back of the house. 
18. Piscina - Originally a fishing pond, the term later evolved to also refer to man-made pools and fountains.
19. Exhedra - Semicircular or semi-open space or room, often found in ancient Greek and Roman architecture, used for conversation and seating. I am going to put in a semicircular bench here, and maybe a cozy brazier. Nice place to sit and chat overlooking the courtyard on those warm summer evenings.
20. Colonnade - Unwalled, covered walkway lined with columns that leads to the bathhouse.
21. Posticum - I forgot to label this one, but it's the read/side exit.

What am I missing? What would you want to see in the main floor of a wealthy noble's country estate?

I first started with Dungeons & Dragons in December of 1979. !!! Back then, our maps were hand-drawn on graph paper, or store-bought modules that were only slightly more sophisticated than graph paper. Played off and on with different groups for decades.

In 2017, having not played for nearly a decade, I started to create my campaign world. I searched for mapping software and the Internet's consensus was that Campaign Cartographer was both the most powerful and the hardest to learn. Sounds like a challenge! I used my tax refund to buy everything except the annuals (which I didn't understand)...and failed.

I've always been a visual learner. I retain more from reading a book than from listening to the audio version of it. I thought I could teach myself from the PDF manuals. I got some basic concepts, but I didn't really get them. I fiddled around with the software but everything looked awful. (They might have looked slightly less awful if I knew how to turn on sheet effects.)

Then COVID hit in 2020, and with a lot of not-leaving-the-house-time, I revisited my world-building, but not map building. It wasn't until mid-2023 (six years after buying the software!) that I finally decided to start watching some of the tutorials. The obvious thing to everyone except me: videos aren't just audio, they are also visual. Things started to click. And then I became addicted to the videos. To see a blank canvass come to life and turn into a work of art! And then to start mapping: even more addicting! I've mentioned this before, but it is really stimulates left brain/right brain simultaneously. There's the creative part about creating a work of art. But there's also the analytical/problem-solving part about how to do that with textures and symbols and optical illusion sheet effects. I posted my first map here (not the first map I created, but the first I posted) in January 2024, and it's been full speed ever since.

I am diving into the interiors now, starting with the first floor (or ground floor).

At this level, the perimeter wall is mostly solid stonework. The defensive passageway with arrow slits will be one story higher. But the gatehouses do have chambers on this level with mechanisms for raising the two portcullises (I was tempted to write portculli) and open the iron gate. Internal spiral staircases allow guards to reach a chamber with access the parapet over the gate, where they can address visitors when the gates are closed.

Mostly I've been working so far on the first floor of the balneae, the bathhouse. This is what it looks like covered:

And here's the (not yet labeled) interior of the first floor:

The balneae, or bathhouse, is connected to the main villa by a colonnade, an unwalled covered walkway lined with pillars.

As you enter, there are stairs going up and down to your left, and the chimney for the hypocaust in the basement on your right. Then you see two lavatories, and then the frigidarium, the very cold pool. Next to the frigidarium is the apodyterium, the changing room where bathers could clean up before entering the communal pools. Across the courtyard is the caldarium, the hot room, where both the water and the tile floor are heated by the hypocaust furnaces in the basement. The main pool in the center, partially open to the sky, is the tepidarium, the warm room, where water is heated to a comfortable temperature but not as hot as a bath like the caldarium. On the northern wall are two saunas, the laconicum (dry sauna) on the northwest side, and the sudatorium (steam sauna) on the northeast.

Downstairs will have the hypocaust as well as the pipes for bringing water to the various pools. Upstairs will have more communal exercise areas, a library, and a balcony overlooking the tepidarium.