I don't have any advice but that is one helluva gorgeous room...

We needed a similar length (can't remember exactly) and I looked everywhere! One option is to buy a PVC pipe - that wouldn't work for us because we have our drapes open most of the time and the rod is visible.

I ended up finding rods at IKEA of all places. They have 10' or 12' rods that can be screwed together to make one even longer rod.

The longest rod I can think of is ones made for closets. Check Ho De or Lowe's. I think they are as large as 14 feet so you'd still need a dbl ended screw. Just make sure you have a bracket at that spot and you should have no trouble at all.
PVC pipe can work, but it's not as sturdy as wooden closet dowels. You can spray paint PVC pipe and there are caps for the ends that can have holes drilled in them for finials.

I used rods from PB that can also be screwed together. They are pretty contemporary, but they might work in a minimalist kind of way. I bet you might even be able to screw a decorative finial onto the end.

Here is a link that might be useful: modern drape rod

This is what I did a few years ago when I couldn't find any extra long rods: I bought three sets of extendable rods from Hancock Fabrics, each with a maximum length of 124" (or 128" can't remember). I only used one set of finials, but used the extension pieces from all sets on one, and provided support for the rods at 4 different points in the middle in addition to the ends. I don't know if this makes sense. Then I used the short (extension-less) pieces from the two remaining sets with its own finials for short windows in the dining room. I still haven't figured out how to post pictures, but I will try to share pictures sometime soon. Good luck.

Thank you for all the advice. I'm going to check all the stores suggested. JC Penney has some rods with finials I love. had thought I could buy several sets of rods, but then I am worried about putting them together, so they won't show.
The JCP rods are kind of pricey and it seems a waste to buy something pricey that won't show... so..
Anyways, thank you!
I have another question about hanging the drapes, but I'll wait on that!

I have bought iron work before from Paso Robles Ironworks, and have been very pleased. I think they can make any length rod for you.

Here is a link that might be useful: company

How will you be attaching the swags, with staples? If the swag is closed at the top, then I'd do as ajsmama suggested and use a board across the top. The finials could still be screwed into the ends of the 1x4's, but looking at your pictures, it looks like it'll be awfully close to another wall, and maybe difficult to use finials. Which wall are you talking about? Do all the rooms open to each other? Will you be doing swags on all the windows? Sorry for all the questions, but I just am not featuring the scenerio. If you let me know more info I might be able to show you a "mock-up" of what it'll look like when you are finished.

I have a 13' bank of windows in my living room and took 2 wooden rods and screwed them together. Just make sure you get adequate center support for the width and weight of your panels. And you can paint it, stain it, etc...and there's a multitude of finials that you can choose as well.

Here's an older photo of the window...We have since changed the supports to one single center support so that I can close the drapes.

Don't forget to look at copper or galvanized pipe as they come in longer lengths. I've used pvc and closet rods for shorter widths and they worked fine, especially if they aren't going to show. Try to use at least one support in the center. You'll save a ton of $ making your own. Ok, maybe not a ton.

Thanks to everyone for answering... I have posted additional messages, but they don't appear...????
Anyhow to answer Sallimo's questions:
The swags with have rod pockets and fixed panels at the end of the outside windows on the eastern wall.
I might have to forego the finials because of the space between the two joining walls, if Idecide to hang the swags and panel above the transom windows.
The North and South walls will have swags/cascades hung on the top of window molding...they will appear to be individually hung with only two finials showing at the outside ends.
I would like to hear ideas on whether I should hang the swags above the transoms and how far above on the eastern wall

Here is a link that might be useful: Great Room

beacu,
Are you sewing these swags? I am still trying to figure out how you are going to hang them on the north and south walls. How will they be individual with only 2 finials? Will there be rod showing between the windows? I'm also curious as to how wide each swag will be. It's difficult to get them to hang nicely when they are extra wide.
Swags will definitely give a formal look, IMHO, which you have already in the dining room.
Do you have any furniture in there, yet? Rugs? Just wondering if there was an updated photo showing your rooms. That's a huge job you're undertaking. I guess you already have your fabric picked out?
I know, I'm full of questions and not helping, but I'm still trying to visualize the final outcome of that many swags.

I bought a couple nice substantial decorative rods from Ross for about $20 or $30 a piece and was able to put them together to make about a 180" rod. They each had a smaller pole that slipped into a larger pole and I used the two larger ones with the smaller one connecting the larger two in the middle. I could have made it even longer by using that fourth pole. I could easily adjust the length by sliding them together as much as I wanted. Used the support brackets provided and had an extra set of finials and one of the smaller poles left over that I could use for a rod for a small window now. It was the least expensive way I found to do it and worked out well. But then, I needed a decorative rod because it would show in places, so maybe you could find an even less expensive way by using wooden dowls or pvc or something. But then you'd still need to buy finials and support brackets which could add up.

{{!gwi}}

I was wondering if you could do relaxed romans instead of swags. I think they are a little more updated look for your room. I like swags in some homes, but it might start looking monotonous in your room. You could carry the romans throughout the downstairs, and possibly only use the drapes in the dining area for the more formal look.
I also think you could skip the romans and just do drapes, too. And as much as I would love to see the drapes just under the arched window, they probably all need to be the same height in that room.
Did you see Willow Decor's panels? She didn't even use a decorative rod---that would save a lot of $$ and worry about a huge rod.

Here is a link that might be useful: Willow Decor's blog and pics of family room

Sallymo, Thank you for replying..Your idea of the relaxed roman shades is appealing and since I have not made a comittment yet...
I will be hiring a lady to make my window treatment I don't have definite measurements for anything it is just preliminary, nor a fabric, but I need to get going...
I don't remember whether I mentioned I'm doing this by taking baby steps since I'm grieving the tragedy of losing my beloved seventeen years old granddaughter...
I start and stop ...
The lady told me I needed one long rod (133") for the NS windows and the cascades would cover the spaces between the windows...the picture you designed looks very nice!!!!
I have been searching the internet for pictures that would reflect my idea before I commit myself....I will look at Willow's blog...
I'm also looking at furniture...It is such a heavy undertaking that I just have to stop and retreat!

I also bought rods from the same company as Deltabreeze. They came very quickly and I am thrilled with them. You can get a couple of diameters and lots of different finials...and different finishes as well. I think that you will be pleased.

beacu,
I remember your story, and I know this job of decorating would be huge for anyone. I wish you lived in my area, I'd love to help. I am surprised your person making the treatments isn't handling the hardware---installing is half the job. Have you seen her work? I'm asking because there's more to window treatments than just sewing. You have a beautiful home and I hope you can find some joy in the process of decorating. I'm glad you're not trying to rush the process.
If you have any questions, feel free to email me through my blog site, I'll list it below. I know people who make window treatments all over the US if you'd like another bid on your job.

Here is a link that might be useful: my blog