Vintage photo from the (late?) 1910s depicting a couple on their wedding day.
She is dressed all in white with a veil and both a wreath and a sprig fastened to her dress with myrtle. Brides had been wearing myrtle since the late 18th century in Sweden harking back to classic ancient traditions, but it was especially popular when wearing a white wedding dress (many Swedish brides in the 19th century wore black, since it could then be used as a Sunday best-dress). In her hand she has a wedding bouquet with roses.
Her husband (I think we can assume this is after the wedding) is wearing a full dress suit (what is also known as 'white tie'). This was a form of formal dress that was much more common a hundred years ago than it is now - but it was still a sign of being rather well off, not something every man owned or wore even on their wedding day.
The photo has an unusually informal tone - they are posing for the camera, but at the same time it looks they are just interrupted in the doorway, like a snapshot of the moment.
No additional information available - the back of the photo is blank. It is probably taken in Sweden, though.