Impressive in appearance:
— A baronial mansion.

synoniemen: imposing, noble, stately.

Roget 878: dignified; stately; proud, proud-crested; lordly, baronial; lofty-minded; highsouled, high-minded, high-mettled^†, high-handed, high-plumed, high-flown, high-toned.    haughty lofty, high, mighty, swollen, puffed up, flushed, blown; vainglorious; purse-proud, fine; proud as a peacock, proud as Lucifer; bloated with pride.    supercilious, disdainful, bumptious, magisterial, imperious, high and mighty, overweening, consequential; arrogant etc. 885; unblushing etc. 880.    stiff, stiff-necked; starch; perked stuck-up; in buckram, strait-laced; prim etc. (affected) 855.    on one's dignity, on one's high horses, on one's tight ropes, on one's high ropes; on stilts; en grand seigneur [Fr.].    ... meer laten zien