I am traveling to Europe in July. Most of my dresses, though tasteful, are just above the knee and sleeveless. Is n ankle-length sheer lace kimono an acceptable covering even though you can see through the fabric?
Is the purpose of the covering to visit churches? The determination of "acceptable" will be up to the attendant at the door. This discussion covers the topic pretty well: https://community.ricksteves.com/travel-forum/italy/question-about-proper-attire-in-n-churches-in-italy