Select the color palette for the interior. Use reds or purples with black and gold to create a rich, luxurious, decadent and dramatic interior. For a lighter, more subtle feel, use soft pastel colors or neutrals. Combine white with delicate cornflower blue, soft yellow or dusty pink, and use silver as an accent color.
Use a satin or damask wallpaper featuring large-scale floral prints, ornate leaf scroll, or Roman or Greek motifs. Add extra texture and pattern with a wallpaper border featuring a coordinating pattern such as honeycomb trellis, stripes, or circle motif. Add crown molding and columns for even more decorative detail.
Tile the floor with highly polished marble, marble-effect, stone, granite or granite-effect tiles. Polished light pine is an alternative flooring option, suitable for a more subtle interpretation of the neoclassical style. Flooring in the neoclassical period usually featured inlaid motifs, so look for Roman, Greek, floral or geometric motifs in whatever material you choose for the flooring.
Select pieces of furniture in the Louis XVI style, which was closely associated with the neoclassical movement. This simple and graceful style of furniture features gentle lines, accented slenderness, fluted legs, and carved rosette, leaf and flower motifs. The furniture is usually made from dark wood such as mahogany, and is highly polished for a deep, rich glow. Fabrics should be patterned in a style similar to the wallpaper.
Dress the windows with multiple layers of contrasting fabric. Secure heavy-looking, floor-length curtains with tasseled tie-backs. Cover the windows with softly draped tulle, which is ideal for privacy, but can also be secured in the center of the windows to add extra texture and interest. Finish with a decorative valance or drapery.
Hang a chandelier as the main lighting in the room. The style can be as decorative or as simple as you wish, depending on both the size of the room and the level of grandeur. For secondary lighting, use wall sconces featuring classic Roman and Greek designs. Place elaborate candelabra around the room.
Add accessories such as silver tea ware, glazed pottery, bronze urns, Greek-style vases and statuary. Soften the feel of a hard tile or wood floor with neoclassical floor rugs.