Catherine, Princess of Wales

, and her husband Prince William spent three days in the American city of Boston.

The last time the couple was in the US was in New York in 2014, so they were a little excited about this trip.

During the trip, they met with Caroline Kennedy, took a walk in the Boston harbor and attended a basketball game.

On the third day of the tour, Catherine visited the Child Development Center at Harvard University.

Catherine, Princess of Wales / Photo: Associated Press

The princess met members of the varsity team and then went on a walk where she met crowds of people who had gathered to chat and take selfies with them.

Catherine, Princess of Wales / Photo: Associated Press

Catherine, Princess of Wales / Photo: Associated Press

Kate wore a demure and elegant long-sleeve sheath dress by Emilia Wickstead that day.

Catherine, Princess of Wales / Photo: Associated Press

The outfit is made in a houndstooth print, midi length and with a small collar.

The decoration of the dress was a laconic belt on the waist, which emphasized Catherine's slender figure.

Catherine, Princess of Wales / Photo: Getty Images

The cost of such a dress, according to the official website, is 1141 euros.

However, Kate's outfit is clearly custom-made, as her dress has long sleeves.

This flawless princess look was completed with a blue short handle bag from Mulberry, black pumps from Gianvito Rossi and gold hoop earrings from British brand Lenique Louis.

The decoration was quite original, because it had uneven edges.

The jewelry studio itself reports that it was inspired by the beauty of coral reefs while making the earrings.

Welsh's ensemble was finished off with sleek, easy waves, a pretty daytime makeup look, and of course, a sapphire

engagement ring

 that used to belong to Princess Diana.

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