To a queen who liked being surrounded with lookers and was capable of dismissing those she thought physically unpleasing, this mattered a lot.

结构剖析：这个句子就是一个简单句，主语是this，谓语为mattered，a lot是副词性短语做状语修饰谓语matter，而to a queen who liked being surrounded with lookers and was capable of dismissing those she thought physically unpleasing是介词短语做状语，表示对象。

在介词短语中含有一个定语从句：who liked being surrounded with lookers and was capable of dismissing those she thought physically unpleasing。

这个定语从句又是有并列连词and连接的一个并列句。一个是：who liked being surrounded with lookers，一个是：was capable of dismissing those she thought physically unpleasing，第二分句中和第一个分句公用一个引导词who，它们共同修饰先行词queen。

在第二个分句中又含有一个定语从句：she thought physically unpleasing。它修饰先行词those。注意这个先行词是一个特殊的词——those。当先行词为those的时候，在句子中做主语，指代人，修饰它的定语从句的引导词或者说是关系代词一定是who，不能用that，由于是做宾语，这里省略了that。